hyphen

Etymology

A learned borrowing from Late Latin hyphen, this came from Ancient Greek ῠ̔φέν (hŭphén, "in one, as a single word"), a univerbation of ῠ̔φ’ ἕν (hŭph’ hén, "under one"), itself from ῠ̔πο- (hŭpo-, "under") plus ἕν (hén, "one"), the neuter of εἷς (heîs, "one").