Inverted breve or arch is a diacritical mark, shaped like the top half of a circle ( ̑ ), that is, like an upside-down breve (˘). It looks similar to the circumflex (ˆ), which has a sharp tip (Â â Ê ê Î î Ô ô Û û), while the inverted breve is rounded: (Ȃ ȃ Ȇ ȇ Ȋ ȋ Ȏ ȏ Ȗ ȗ).
Inverted breve can occur above or below the letter. It is not used in any natural language alphabet. It is identical in form to the Ancient Greek circumflex.
Ğ (g with breve; minuscule: ğ) is a Latin letter found in the Turkish and Azerbaijani alphabets as well as the Latin alphabets of Zazaki, Laz, Crimean Tatar, Tatar, and Kazakh. It traditionally represented the voiced velar fricative /ɣ/ or the voiced uvular fricative /ʁ/. However, in Turkish, the phoneme has in most cases been reduced to a silent letter, serving as a vowel-lengthener. But for Crimean Tatar spelling in Romania it represents the voiced palato-alveolar affricate /d͡ʒ/.
In digital typography, combining characters are characters that are intended to modify other characters. The most common combining characters in the Latin script are the combining diacritical marks (including combining accents).
Unicode also contains many precomposed characters, so that in many cases it is possible to use both combining diacritics and precomposed characters, at the user's or application's choice. This leads to a requirement to perform Unicode normalization before comparing two Unicode strings and to carefully design encoding converters to correctly map all of the valid ways to represent a character in Unicode to a legacy encoding to avoid data loss.
A macron (/ˈmækrɒn, ˈmeɪ-/ MAK-ron, MAY-) is a diacritical mark: it is a straight bar ¯ placed above a letter, usually a vowel. Its name derives from Ancient Greek μακρόν (makrón) 'long' because it was originally used to mark long or heavy syllables in Greco-Roman metrics. It now more often marks a long vowel. In the International Phonetic Alphabet, the macron is used to indicate a mid-tone; the sign for a long vowel is instead a modified triangular colon ⟨ː⟩.
The opposite is the breve ⟨˘⟩, which marks a short or light syllable or a short vowel.