a. dial. [f. SUMP sb. + -Y1. Cf. Du. sompig, G. sumpfig, Sw. sumpig.] Boggy, swampy.

1

1829.  Brockett, N. C. Gloss., Sumpy, miry, dirty.

2

1892.  J. Lucas, trans. Kalm’s England, 305. There should be no sumpy places.

3