aphesis
noun
aph·e·sis ˈa-fə-səs 
plural apheses ˈa-fə-ˌsēz
: aphaeresis consisting of the loss of a short unaccented vowel (as in lone for alone)
aphetic
ə-ˈfe-tik
adjective aphetically
ə-ˈfe-ti-k(ə-)lē
adverb 
Word History
Etymology
New Latin, from Greek, release, from aphienai to let go, from apo- + hienai to send — more at jet
First Known Use
1880, in the meaning defined above