Uk (Cyrillic)

Not to be confused withOandY.

For the UK, seeUnited Kingdom.For other uses, seeUK (disambiguation)andOy (disambiguation).

Uk(Ѹ ѹ; italics:Ѹ ѹ) is adigraphof theearly Cyrillic Alpha betof the lettersОandУ,although commonly considered and used as a single letter. To save space, it was often written as a verticalligature(Ꙋ ꙋ), called "monograph Uk". In modern times,⟨оу⟩has been replaced by the simple⟨у⟩. Ѹ is romanized as U, Ꙋ is romanized as Ū.

Cyrillic letter Uk
Phonetic usage:	/u/
Numeric value:	400
TheCyrillic script
Slavicletters
А А́ А̀ А̂ А̄ Ӓ Б В Г Ґ Д Ђ Ѓ Е Е́ Ѐ Е̂ Е̄ Ё Є Ж З З́ Ѕ И І Ї Ꙇ И́ Ѝ И̂ Ӣ Й Ӥ Ј К Л Љ М Н Њ О О́ О̀ О̂ Ō Ӧ П Р С С́ Т Ћ Ќ У У́ У̀ У̂ Ӯ Ў Ӱ Ф Х Ц Ч Џ Ш Щ Ꙏ Ъ Ъ̀ Ы Ы́ Ь Ѣ Э Э́ Ю Ю́ Ю̀ Я Я́ Я̀
Non-Slavic letters
Ӑ А̊ А̃ Ӓ̄ Ӕ Ә Ә́ Ә̃ Ӛ В̌ Ԝ Г̑ Г̇ Г̣ Г̌ Г̂ Г̆ Г̈ г̊ Ҕ Ғ Ӻ Ғ̌ ғ̊ Ӷ Г̡ Д́ Д̌ Д̈ Д̣ Д̆ Ӗ Е̃ Ё̄ Є̈ Ԑ Ԑ̈ Җ Ӝ Ӂ Ж̣ Ҙ Ӟ З̌ З̣ З̆ Ӡ И̃ Ҋ Қ Ӄ Ҡ Ҟ Ҝ К̣ к̊ қ̊ Ԛ ᴫ Л́ Ӆ Ԯ Ԓ Л̈ Ӎ ᵸ Н́ Ӊ Ң Ԩ Ӈ Ҥ О̆ О̃ Ӧ̄ Ө Ө̄ Ө́ Ө̆ Ӫ Ԥ П̈ Р̌ Ҏ С̌ Ҫ С̣ С̱ Т́ Т̈ Т̌ Т̇ Т̣ Ҭ Ᲊ У̃ Ӳ У̊ Ӱ̄ Ұ Ү Ү́ Х̣ Х̱ Х̮ Х̑ Х̌ Ҳ Ӽ х̊ Ӿ ӿ̊ Һ Һ̈ Ԧ Ц̌ Ц̈ Ҵ Ҷ Ҷ̣ Ӵ Ӌ Ҹ Ч̇ Ч̣ Ҽ Ҿ Ш̣ ꚜ Ы̆ Ы̄ Ӹ ꚝ Ҍ Ҩ Э̆ Э̄ Э̇ Ӭ Ӭ́ Ӭ̄ Ю̆ Ю̈ Ю̄ Я̆ Я̄ Я̈ Ӏ ʼ ˮ
Archaicor unused letters
А̨ Б̀ Б̣ Б̱ В̀ Г̀ Г̧ Г̄ Г̓ Ҕ̀ Ҕ̆ Ԁ Д̓ Д̀ Д̨ Ԃ Ꚁ Ꙣ Е̇ Е̨ Ж̀ Ж̑ Ꙃ Ꙅ Џ̆ Ꚅ Ꚅ̆ Ꙁ З̀ З̑ Ԅ Ԇ Ꚉ Ԫ Ꚃ Ꚕ І̂ І̣ І̨ Ј̵ Ј̃ Ꙉ К̓ К̀ К̆ Ӄ̆ К̑ К̇ К̈ К̄ Ԟ К̂ Л̀ Ԡ Ꙥ Ԉ Л̑ Л̇ Ԕ М̀ М̃ Ꙧ Н̀ Н̄ Н̧ Н̃ Ԋ Ԣ Н̡ Ѻ Ꙩ Ꙫ Ꙭ ꙮ Ꚙ Ꚛ П̓ П̀ П́ Ҧ П̧ П̑ Ҁ Ԛ̆ Р́ Р̀ Р̃ Ԗ С̀ С̈ Ԍ Ҫ̓ Т̓ Т̀ Ԏ Т̑ Ꚋ Т̧ Ꚍ Ꚍ̆ Ѹ Ꙋ У̇ У̨ ꙋ́ Ф̑ Ф̓ Х́ Х̀ Х̆ Х̇ Х̧ Х̾ Х̓ һ̱ Ѡ Ꙍ Ѽ Ѿ Ꙡ Ц̀ Ц́ Ц̓ Ꚏ Ꚏ̆ Ꚑ Ч́ Ч̀ Ч̆ Ч̑ Ч̓ Ԭ Ꚓ Ꚇ Ꚇ̆ Ҽ̆ Ш̀ Ш̆ Ш̑ Щ̆ Ꚗ Ꚗ̆ Ъ̄ Ъ̈ Ъ̈̄ Ꙑ Ы̂ Ы̃ Ѣ́ Ѣ̈ Ѣ̆ Ꙓ Э̨ Э̂ Ꙕ Ю̂ Ꙗ Я̈ Я̂ Я̨ Ԙ Ѥ Ѧ Ꙙ Ѫ Ꙛ Ѩ Ꙝ Ѭ Ѯ Ѱ Ѳ Ѵ Ѷ Ꙟ
List of Cyrillic letters List of Cyrillic multigraphs

Development in Old East Slavic

Monograph Ukligature

The simplification of the digraph⟨оу⟩to⟨у⟩was first brought about inOld East Slavictexts and only later taken over into South Slavic languages.

One can see this development in the Novgorodbirch-bark letters:The degree to which this letter was used here differed in two positions: in word-initial position or before a vowel (except for thejers), and after a consonant.

Before a consonant,⟨оу⟩was used 89% of the time in the writings before 1100. By 1200, it was used 61% of the time, with the letter⟨у⟩used 14% of the time; by 1300, оу had reached 28%, surpassed by⟨у⟩at 45%. From the late 14th century on, there are no more instances of⟨оу⟩being used in this position, with⟨у⟩appearing 95% of the time.

The decrease in usage was more gradual after a consonant. Although there are no instances of the use of⟨у⟩in this position before c. 1200,⟨оу⟩gradually decreased from 88% before 1100 to 57% by 1200. The frequency of⟨оу⟩remained steady between 47% and 44% until 1400, when it experienced another decrease to 32%. Meanwhile, the use of⟨у⟩increased from 4% in the early 13th century, to 20% by the mid-13th century, 38% by the mid 14th century, and 58% by the early 15th century.

Church Slavonic

Similarly to the letterІ,the usage of Uk in Church Slavonic orthography was standardised byMeletius Smotrytsky,who assigned the two different forms (monograph and digraph) different functions. The originalоуform was to be used at the beginning of words (for example,оучитель) while the monographꙋwas to be used in the middle and end of words (for example,мꙋжъ,комꙋ). Similarly to the rule forі,this would be used in most Cyrillic languages until the adoption of theCivil script.

Representation on computers

The letter Uk was first represented inUnicode1.1.0 asU+0478and 0479,CYRILLIC CAPITAL/SMALL LETTER UK(Ѹ ѹ). It was later recognized that the glyph to be used for the letter had not been adequately specified, and it had been represented as either a digraph or monograph letter in different released fonts. There was also the difficulty that in written texts the letter may appear in lowercase (оу), uppercase (Оу), or inall caps(ОУ), which is possible to be used for heading.

To resolve this ambiguity, Unicode 5.1 has deprecated the use of the original code points, introduced U+A64A and A64B,CYRILLIC CAPITAL/SMALL LETTER MONOGRAPH UK(Ꙋ ꙋ), and recommends composing the digraph with two individual characters⟨о⟩+⟨у⟩.

Unicode 9.0 has also introduced U+1C82CYRILLIC SMALL LETTER NARROW Owhich can also be used for composing the digraph form (⟨ᲂ⟩+⟨у⟩) and U+1C88CYRILLIC SMALL LETTER UNBLENDED UK(ᲈ) as a variant of monograph form.

However, the recommended method may cause some text representation problems. The letterУdid not originally appear alone in the Old Church Slavonic orthography, and thus its code point was replaced in different Old Slavonic computer fonts with digraph or monograph forms of the Uk or with the tailed form ofIzhitsa.TailedIzhitsamay be used as a part of the digraph, but using the shape of the monograph Uk as a part of the digraph Uk (оꙋ) is incorrect.

The minuscule monograph Uk was used in theRomanian Transitional Alphabetto represent/u/,but due to font restrictions, theȢ ligatureorLatin gammaare occasionally used instead.

Computing codes

Character information

Preview	О		о		ᲂ		У		у
Unicode name	CYRILLIC CAPITAL LETTER O		CYRILLIC SMALL LETTER O		CYRILLIC SMALL LETTER NARROW O		CYRILLIC CAPITAL LETTER U		CYRILLIC SMALL LETTER U
Encodings	decimal	hex	dec	hex	dec	hex	dec	hex	dec	hex
Unicode	1054	U+041E	1086	U+043E	7298	U+1C82	1059	U+0423	1091	U+0443
UTF-8	208 158	D0 9E	208 190	D0 BE	225 178 130	E1 B2 82	208 163	D0 A3	209 131	D1 83
Numeric character reference	О	О	о	о	ᲂ	ᲂ	У	У	у	у
Named character reference	О		о				У		у

Character information

Preview	Ѹ		ѹ		Ꙋ		ꙋ		ᲈ
Unicode name	CYRILLIC CAPITAL LETTER UK		CYRILLIC SMALL LETTER UK		CYRILLIC CAPITAL LETTER MONOGRAPH UK		CYRILLIC SMALL LETTER MONOGRAPH UK		CYRILLIC SMALL LETTER UNBLENDED UK
Encodings	decimal	hex	dec	hex	dec	hex	dec	hex	dec	hex
Unicode	1144	U+0478	1145	U+0479	42570	U+A64A	42571	U+A64B	7304	U+1C88
UTF-8	209 184	D1 B8	209 185	D1 B9	234 153 138	EA 99 8A	234 153 139	EA 99 8B	225 178 136	E1 B2 88
Numeric character reference	Ѹ	Ѹ	ѹ	ѹ	Ꙋ	Ꙋ	ꙋ	ꙋ	ᲈ	ᲈ

Further reading

• Kaplan, Michael S. “Every character has a story #10: U+0478/U+0479 (CYRILLIC LETTER UK)”,May 21, 2005.
• Zaliznyak, Andrey(2004).Drevnenovgorodskij dialekt.Moscow: Jazyki slavjanskoj kul'tury.