syncope
Syncope (noun) means the dropping of a sound, often a vowel, from the middle of a word, sometimes losing a whole syllable.
Etymology
Learned borrowing from Late Latin syncopē, from Ancient Greek συγκοπή (sunkopḗ), from συγκόπτω (sunkóptō, “cut up”) + -η (-ē, nominalization suffix), from σύν (sún, “beside, with”) + κόπτω (kóptō, “strike, cut off”). Partly continues the (near-)doublets syncopis and sincopin, both from the Old French sincopin (“faintness”) (itself from Late Latin accusative syncopen), with the pathological meaning "a loss of consciousness accompanied by a weak pulse", attested from the fifteenth century. Usage in the form syncope, with the phonological meaning "contraction of a word by omission of middle sounds or letters" attested from the 1520s. Syncopis and sincopin were "re-Latinized" to the form syncope in English in the sixteenth century. The musical usage first occurs after the 1660s, following the musical usage of syncopation and syncopate.
