Here's why:
* "Y" as a vowel: When "y" acts as a vowel, it typically makes the sound of "i" (as in "happy," "my," "cry").
* "Y" as a consonant: When "y" acts as a consonant, it typically makes the sound of "j" (as in "yellow," "yesterday," "you").
Therefore, if a word ends in "y," it will always be pronounced as a consonant sound.
There might be some exceptions, like proper nouns, foreign words, or technical terms, but they are not considered standard English vocabulary.