Gwysgiad, n. a summoning
Gwysgod, n. precipitation
Gwysigen, n. a blister, a bladder
Gwysio, v. to summon
Gwysiol, a. summoning
Gwyslythyr, n. writ of citation
Gwyso, v. to summon, to cite
Gwyst, n. what is shrunk or low
Gwystl, n. a pledge; a hostage
Gwystle, n. a pledging