[2] Although in English this sound has additional length (usually being represented as /iː/) and is not normally pronounced as a pure vowel (it is a slight diphthong), some dialects have been reported to pronounce the phoneme as a pure sound.

[3] A pure [i] sound is also heard in many other languages, such as French, in words like chic.

The close front unrounded vowel is the vocalic equivalent of the palatal approximant [j].

Languages that use the Latin script commonly use the letter ⟨i⟩ to represent this sound, though there are some exceptions: in English orthography that letter is usually associated with /aɪ/ (as in bite) or /ɪ/ (as in bit), and /iː/ is more commonly represented by ⟨e⟩, ⟨ea⟩, ⟨ee⟩, ⟨ie⟩ or ⟨ei⟩, as in the words scene, bean, meet, niece, conceive; (see Great Vowel Shift).

Irish orthography reflects both etymology and whether preceding consonants are broad or slender, so such combinations as ⟨aí⟩, ⟨ei⟩, and ⟨aío⟩ all represent /iː/.