I with macron (Cyrillic)
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I with macron (Ӣ ӣ; italics: Ӣ ū) is a letter of the Cyrillic script. In Tajik, it represents a stressed close front unrounded vowel /i/ at the end of a word. In Kildin Sami on the Kola Peninsula and Mansi in western Siberia, it represents long /iː/. In those languages, vowel length is distinctive, and the macron marks the long version of vowels.
I with macron is also used in Aleut (Bering dialect). It is the sixteenth letter of the modern Aleut alphabet. It looks similar to the Short I. (Й й Й й)
I with macron also appears in the Bulgarian and Serbian languages.
|Unicode name||CYRILLIC CAPITAL LETTER
I WITH MACRON
|CYRILLIC SMALL LETTER|
I WITH MACRON
|UTF-8||211 162||D3 A2||211 163||D3 A3|
|Numeric character reference||Ӣ
South Slavic languages
I with macron is used in some of the South Slavic languages, mainly Bulgarian and Serbian for two-syllable offset based on the old Slavic accent law, to become easy for the accent analogy to pass in separate words, to become lexical. as the analogy passed through three-syllable oxytones with a tonal pattern: тетӣвà. 
- И и : Cyrillic letter I
- Й й : Cyrillic letter Short I
- Ī ī : Latin letter I with macron – a Latvian, Latgalian, Livonian, and Samogitian letter
- Cyrillic characters in Unicode
- ^ Головко, Е. В. (1994). Словарь алеутско-русский и русско-алеутский (беринговский диалект) [Aleut-Russian and Russian-Aleut Dictionary (Bering dialect)]. p. 14. ISBN 5-09-002312-3.
- ^ "Accent in Bulgarian dialects". October 25, 2012.
- ^ "Bulgarian dialects". May 9, 2013.