Marish \Mar"ish\, n. [Cf. F. marais, LL. marascus. See {Marsh}.] Low, wet ground; a marsh; a fen; a bog; a moor. [Archaic] --Milton. Tennyson. Marish \Mar"ish\, a. 1. Moory; fenny; boggy. [Archaic] 2. Growing in marshes. ``Marish flowers.'' --Tennyson.