Gwelliannu, to better, to mend
Gwelliant, n. amendment
Gwellig, a. improving, mending
Gwellineb, a. improvement
Gwelling, n. a benediction
Gwellt, n. grass; sward; straw
Gwelltiad, n. a turning to straw
Gwelltio, v. to turn to straw
Gwelltog, a. grassy, having straw
Gwelltorio, v. to cover with grass