aphesis
The loss of the initial unstressed vowel of a word.
countable, uncountable
The word "scarp" is derived from "escarp" by aphesis.
Where it comes from
Attested since 1880. Learned borrowing from Ancient Greek ἄφεσις (áphesis, “letting go”), from ἀφίημι (aphíēmi), from ἀπο- (apo-, “off”) + ἵημι (híēmi, “send forth”).
Adapted from the Wiktionary entry aphesis (CC BY-SA 4.0).