hyphen

Etymology

Learned borrowing from Late Latin hyphen, from Ancient Greek ῠ̔φέν (hŭphén, “in one, as a single word”), univerbation of ῠ̔φ’ ἕν (hŭph’ hén, “under one”), from ῠ̔πο- (hŭpo-, “under”) + ἕν (hén, “one”), neuter of εἷς (heîs, “one”).