The first syllable of sterile and Beryl has the same vowel as in men or Ben.
Yes, I just said that: the e sound in men and Ben is the same as the a-sound in bare or air: BEH-rull, = barrel.
I breathe ehr. I climb the stehr.

The ile part of sterile is pronounced the same as in isle/aisle.
Nope. Ill or ull.