why / wye / y are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
why: (noun) the cause or intention underlying an action or situation, especially in the phrase `the whys and wherefores'.
wye: NA
y: (noun) the 25th letter of the Roman alphabet.
why: w·AY
wye: w·AY
y: w·AY
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)