what is about consonant word ?

About consonant word.
Consonant is speech sound produced by a complete or partial stop of the breath.
The letter of the alphabet or symbol; (eg.phonetic) for such a sound are:-
b, c, d, f, etc.

由A E I O U 開頭的字，記得用AN，例如AN APPLE，AN EGG，AN ICE，AN OLD MAN，AN UNIVERSITY