a. [f. SWAMP sb. + -ISH1.] = SWAMPY.
1725. MSS. Dk. Portland (Hist. MSS. Comm.), VI. 121. The ground is very swampish and damp.
1880. Miss Bird, Japan, I. 123. Passing over a swampish level.
Hence Swampishness.
1879. Miss Bird, Rocky Mountains, 20. The road at first lay through a valley without a river, but some swampishness nourished some rank swamp-grass.