M'ARSH, noun A tract of low land, usually or occasionally covered with water, or very wet and miry, and overgrown with coarse grass or with detached clumps of sedge; a fen. It differs from swamp, which is merely moist or spungy land, but often producing valuable crops of grass. Lowland occasionally overflowed by the tides, is called salt marsh
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI