Voiced labial–velar approximant in the context of "Ϝ"

The Persian alphabet (Persian: الفبای فارسی, romanized: Alefbâ-ye Fârsi), also known as the Perso-Arabic script, is the right-to-left alphabet used for the Persian language. It is largely identical to the Arabic script with four additional letters: پ چ ژ گ (the sounds 'g', 'zh', 'ch', and 'p', respectively), in addition to the obsolete ڤ that was used for the sound /β/. This letter is no longer used in Persian, as the [β]-sound changed to [b], e.g. archaic زڤان /zaβɑn/ > زبان /zæbɒn/ 'language'. Although the sound /β/ (ڤ) is written as "و" nowadays in Farsi (Dari-Parsi/New Persian), it is different to the Arabic /w/ (و) sound, which uses the same letter.

It was the basis of many Arabic-based scripts used in Central and South Asia. It is used for both Iranian and Dari: standard varieties of Persian; and is one of two official writing systems for the Persian language, alongside the Cyrillic-based Tajik alphabet.

An oral consonant is a consonant sound in speech that is made by allowing air to escape from the mouth, as opposed to the nose, as in a nasal consonant. To create an intended oral consonant sound, the entire mouth plays a role in modifying the air's passageway. This rapid modification of the air passageway using the tongue and lips makes changes to the waveform of the sound by compressing and expanding the air. In addition to the nose and mouth, the vocal cords and lungs also make a contribution to producing speech by controlling the volume (amplitude) and pitch (frequency) of the sound. The use of the vocal cords will also determine whether the consonant is voiced or voiceless. Most consonants are oral, such as, for example [p], [w], [v] and [x]. The others are nasal, such as the nasal occlusives [m] or [n].

Waw (wāw "hook") is the sixth letter of the Semitic abjads, including Phoenician wāw 𐤅, Aramaic waw 𐡅,Hebrew vav ו‎, Syriac waw ܘ and Arabic wāw و‎ (sixth in abjadi order; 27th in modern Arabic order). It is also related to the Ancient North Arabian 𐪅‎‎‎, South Arabian 𐩥, and Ge'ez ወ.

It represents the consonant [w] in classical Hebrew, and [v] in modern Hebrew, as well as the vowels [u] and [o]. In text with niqqud, a dot is added to the left or on top of the letter to indicate, respectively, the two vowel pronunciations.

The Persian alphabet (Persian: الفبای فارسی, romanized: Alefbâ-ye Fârsi), also known as the Perso-Arabic script, is the right-to-left alphabet used for the Persian language. An Arabic-based alphabet, it is largely identical to the Arabic alphabet with four additional letters: پ چ ژ گ (the sounds 'g', 'zh', 'ch', and 'p', respectively), in addition to the obsolete ڤ that was used for the sound /β/. This letter is no longer used in Persian, as the [β]-sound changed to [b], e.g. archaic زڤان /zaβɑn/ > زبان /zæbɒn/ 'language'. Although the sound /β/ (ڤ) is written as "و" nowadays in Farsi (Dari-Parsi/New Persian), it is different to the Arabic /w/ (و) sound, which uses the same letter.

It was the basis of many Arabic-based scripts used in Central and South Asia. It is used for both Iranian and Dari: standard varieties of Persian; and is one of two official writing systems for the Persian language, alongside the Cyrillic-based Tajik alphabet.

Ur is the recorded name for the rune ᚢ in both Old English and Old Norse, found as the second rune in all futharks (runic alphabets starting with F, U, Þ, Ą, R, K), i.e. the Germanic Elder Futhark, the Anglo-Frisian Futhark and the Norse Younger Futhark, with continued use in the later medieval runes, early modern runes and Dalecarlian runes.

It corresponds to the letter u in the Latin alphabet, but also carries other sound values, especially in Younger Futhark, where its sound values correspond to the vowels: [u] , [ø] , [y] and [œ] etc., and the consonants: [v] and [w] etc., in the Latin alphabet.