united in pairs; yoked together; coupled.-in single pairs; coupled.-containing two or more radicals supposed to act the part of a single one.-agreeing in derivation and radical signification; -- said of words.-presenting themselves simultaneously and having reciprocal properties; -- frequently used in pure and applied mathematics with reference to two quantities, points, lines, axes, curves, etc.-a word agreeing in derivation with another word, and therefore generally resembling it in signification.-a complex radical supposed to act the part of a single radical.-to unite in marriage; to join.-to inflect (a verb), or give in order the forms which it assumed in its several voices, moods, tenses, numbers, and persons.-to unite in a kind of sexual union, as two or more cells or individuals among the more simple plants and animals.