名詞 aphesis:

1. the gradual disappearance of an initial (usually unstressed) vowel or syllable as in `squire' for `esquire'

aph.e.sis

n.（名詞）
【復數(shù)】 aph.e.ses[-sôz.] 【語言學】
The loss of an initial, usually unstressed vowel, as incute from acute.
詞首脫落：詞首，通常是非重讀元音的脫落，如cute 源自于 acute

來源：
Greek [a release]
希臘語 [釋放，解除]
from aphienai [to let go]
源自 aphienai [放走]
apo- [apo-]
apo- [前綴，表示.遠離.，.分離.]
hienai he- [to send] * see diesis
hienai he- [送] *參見 diesis

【引伸】
aphet.ic
aphet.ically
adv.（副詞）