Gwaesiad, n. a giving pledge
Gwaesol, a. earnest; warranting
Gwaesu, v. to pledge
Gwaeth, a. worse
Gwaethâd, n. an impairing
Gwaethach, a. worse, more bad
Gwaethaf, a. worst, most bad
Gwaethâu, v. to grow worse
Gwaetherwydd, interj. alas
Gwaethliad, n. a struggling