Gwystledigaeth, the act of pledging
Gwystleidiaeth, n. a pledging; a mortgaging
Gwystliad, n. a pledging
Gwystlo, v. to pledge, to pawn
Gwystlwr, n. a pawner
Gwystno, v. to wither
Gwystyn, a. withered, dried
Gwyth, n. a channel; a drain; a view
Gwythad, n. irritation, chafing
Gwythaint, n. bird of wrath