Meaning of NARROW in English
(superl.) Formed (as a vowel) by a close position of some part of the tongue in relation to the palate; or (according to Bell) by a tense condition of the pharynx; -- distinguished from wide; as e (eve) and / (f/d), etc., from i (ill) and / (f/t), etc. See Guide to Pronunciation, / 13.
Webster's English dictionary. Английский словарь Webster. 2012