hyphaeresis

noun

hy·​phaer·​e·​sis hī-ˈfer-ə-səs 

 especially British  -ˈfir-

: the omission of a sound, letter, or syllable from the body of a word

Word History

Etymology

borrowed from Greek hyphaíresis "taking from below, subtraction, omission of a letter," from hyphaireîn "to draw from under, pilfer, subtract" (from hyp- hyp- + haireîn "to take, grasp," of obscure origin) + -sis -sis

First Known Use

1884, in the meaning defined above