Old French language in the context of Southern France

A duty (from "due" meaning "that which is owing"; Old French: deu, did, past participle of devoir; Latin: debere, debitum, whence "debt") is a commitment or expectation to perform some action in general or if certain circumstances arise. A duty may arise from a system of ethics or morality, especially in an honor culture. Many duties are created by law, sometimes including a codified punishment or liability for non-performance. Performing one's duty may require some sacrifice of self-interest.

A sense-of-duty is also a virtue or personality trait that characterizes someone who is diligent about fulfilling individual duties or who confidently knows their calling. A sense-of-duty can also come from a need to fulfill familial pressures and desires. This is typically seen in a militaristic or patriotic way. A distinction is commonly made between "positive duties", which a person must undertake, and "negative duties", which relate to actions from which a person must refrain. Michael Freeman notes that negative duties may be easier to fulfill as they do not require any action.

An emperor (from Latin: imperator, via Old French: empereor) is the (male) ruler of an empire. Empress, the female equivalent, may indicate an emperor's wife (empress consort), mother/grandmother (empress dowager/grand empress dowager), or a woman who rules in her own right and name (empress regnant or suo jure). Emperors are generally recognized to be of the highest monarchic honour and rank, surpassing king. In Europe, the title of Emperor has been used since the Middle Ages, considered in those times equal or almost equal in dignity to that of Pope due to the latter's position as visible head of the Church and spiritual leader of the Catholic part of Western Europe. The emperor of Japan is the only currently reigning monarch whose title is translated into English as "Emperor", although he no longer reigns over an empire.

Both emperors and kings are monarchs or sovereigns, both emperor and empress are considered monarchical titles. In as much as there is a strict definition of emperor, it is that an emperor has no relations implying the superiority of any other ruler and typically rules over more than one nation. Therefore, a king might be obliged to pay tribute to another ruler, or be restrained in his actions in some unequal fashion, but an emperor should in theory be completely free of such restraints. However, monarchs heading empires have not always used the title in all contexts—the British sovereign did not assume the title Empress of the British Empire even during the incorporation of India, though she was declared Empress of India.

The title of imperator (/ˌɪmpəˈrɑːtər/ im-pə-RAH-tər) originally meant the rough equivalent of commander under the Roman Republic. Later, it became a part of the titulature of the Roman Emperors as their praenomen. The Roman emperors generally based their authority on multiple titles and positions, rather than preferring any single title. Nevertheless, imperator was used relatively consistently as an element of a Roman ruler's title throughout the Principate and the later Roman Empire. It was abbreviated to "IMP" in inscriptions. The word derives from the stem of the verb imperare, meaning 'to order, to command'. The English word emperor derives from imperator via Old French: Empereür.

A refrain (from Vulgar Latin: refringere, "to repeat", through Old French: refraindre) is the line or lines that are repeated in poetry or in music—the "chorus" of a song. Poetic fixed forms that feature refrains include the villanelle, the virelay, and the sestina.

In popular music, the refrain or chorus may contrast with the verse melodically, rhythmically, and harmonically; it may assume a higher level of dynamics and activity, often with added instrumentation. Chorus form, or strophic form, is a sectional and/or additive way of structuring a piece of music based on the repetition of one formal section or block played

Vinegar (from Old French vyn egre 'sour wine') is an odorous aqueous solution of diluted acetic acid and trace compounds that may include flavorings or naturally occurring organic compounds. Vinegar typically contains from 4% to 18% acetic acid by volume.

Usually, the acetic acid is produced by a double fermentation—converting simple sugars to ethanol using yeast, and then converting ethanol to acetic acid using acetic acid bacteria. Many types of vinegar are made, depending on source materials.

A portcullis (from Old French porte coleice 'sliding gate') is a heavy, vertically closing gate typically found in medieval fortifications. It consists of a latticed grille made of wood and/or metal, which slides down grooves inset within each jamb of the gateway.

An alley or alleyway is a narrow lane, path, or passageway, often reserved for pedestrians, which usually runs between, behind, or within buildings in towns and cities. It is also a rear access or service road (back lane), or a path, walk, or avenue (French allée) in a park or garden.

A covered alley or passageway, often with shops, may be called an arcade. The origin of the word alley is late Middle English, from Old French: alee "walking or passage", from aller "to go", from Latin: ambulare "to walk".

The chanson de geste (Old French for 'song of heroic deeds', from Latin: gesta 'deeds, actions accomplished') is a medieval narrative, a type of epic poem that appears at the dawn of French literature. The earliest known poems of this genre date from the late 11th and early 12th centuries, shortly before the emergence of the lyric poetry of the troubadours and trouvères, and the earliest verse romances. They reached their highest point of acceptance in the period 1150–1250.

Composed in verse, these narrative poems of moderate length (averaging 4000 lines) were originally sung, or (later) recited, by minstrels or jongleurs. More than one hundred chansons de geste have survived in approximately three hundred manuscripts that date from the 12th to the 15th century.

Chrétien de Troyes (Modern French: [kʁetjɛ̃ də tʁwa]; Old French: Crestien de Troies [kresˈtjẽn də ˈtrojəs]; fl. c. 1160–1191) was a French poet and trouvère known for his writing on Arthurian subjects such as Gawain, Lancelot, Perceval, and the Holy Grail. Chrétien's chivalric romances, including Erec and Enide, Lancelot, Perceval, and Yvain, represent some of the best-regarded works of medieval literature. His use of structure, particularly in Yvain, has been seen as a step toward the modern novel.

A hatchet (from the Old French hachete, a diminutive form of hache, 'axe' of Germanic origin) is a single-handed striking tool with a sharp blade on one side used to cut and split wood, and a hammerhead on the other side. Hatchets may also be used for hewing when making flattened surfaces on logs; when the hatchet head is optimized for this purpose it is called a hewing hatchet.

The earliest known use of the noun hatchet is in the Middle English period (1150—1500) Although 'hand axe' and 'hatchet' are often used interchangeably in contemporary usage, 19th and 20th century American manufacturers and retailers (Collins, Kelly, Vaughan, Warren, Mann; Simmons, Shapleigh, Sears, et al.) unanimously distinguished hatchets from hand axes in their product catalogs, listing them in separate groupings.

A porch (from Old French porche; from Latin porticus 'colonnade', from porta 'passage') is a room or gallery located in front of an entrance to a building. A porch is placed in front of the façade of a building it commands, and forms a low front. Alternatively, it may be a vestibule (a small room leading into a larger space) or a projecting building that houses the entrance door of a building.

Porches exist in both religious and secular architecture. There are various styles of porches, many of which depend on the architectural tradition of its location. Porches allow for sufficient space for a person to comfortably pause before entering or after exiting a building, or to relax on. Many porches are open on the outward side with balustrade supported by balusters that usually encircles the entire porch except where stairs are found.

A lozenge (/ˈlɒzɪndʒ/ LOZ-inj; symbol: ◊), often referred to as a diamond, is a form of rhombus. The definition of lozenge is not strictly fixed, and the word is sometimes used simply as a synonym (from Old French losenge) for rhombus. Most often, though, lozenge refers specifically to a thin rhombus, especially one with two acute angles of 45° and two obtuse angles of 135°.

The lozenge shape is often used in parquetry (with acute angles that are 360°/n with n being an integer higher than 4, because they can be used to form a set of tiles of the same shape and size, reusable to cover the plane in various geometric patterns as the result of a tiling process called tessellation in mathematics) and as decoration on ceramics, silverware and textiles. It also features in heraldry and playing cards.

In the Middle Ages, the term bezant (Old French: besant, from Latin bizantius aureus) was used in Western Europe to describe several gold coins of the east, all derived ultimately from the Roman solidus. The word itself comes from the Greek Byzantion, the ancient name of Constantinople, the capital of the Byzantine Empire.

The original "bezants" were the gold coins produced by the government of the Byzantine Empire, first the nomisma and from the 11th century the hyperpyron. Later, the term was used to cover the gold dinars produced by Islamic governments. In turn, the gold coins minted in the Kingdom of Jerusalem and County of Tripoli were termed "Saracen bezants" (besantius saracenatus), or "fake dinars" (dīnār ṣūrī), since they were modelled on the Fatimid dinar. A completely different electrum coin based on Byzantine trachea was minted in the Kingdom of Cyprus and called the "white bezant".

A clerestory (/ˈklɪərstɔːri/ KLEER-stor-ee; lit. 'clear storey', also clearstory, clearstorey, or overstorey; from Old French: cler estor) is a high section of wall that contains windows above eye-level. Its purpose is to admit light, fresh air, or both.

Historically, a clerestory formed an upper level of a Roman basilica or of the nave of a Romanesque or Gothic church, the walls of which rise above the rooflines of the lower aisles and which are pierced with windows.

Robert I (1011 – 21 March 1076), known as the Old or the Headstrong (Old French: Tête-Hardi), was Duke of Burgundy from 1032 to his death. Robert was the third son of King Robert II of France and Constance of Arles. His brother was Henry I of France.