Ystyrio, v. to consider, to regard
Ystyriol, a. considerate
Ystyrioldeb, n. considerateness
Ystyrmant, n. a jews-harp
Ystyw, n. a settlement
Ystywaws, n. a pair of stays
Ystywanu, v. to belabour
Ystywell, a. steady, manageable
Ystywellu, v. to make steady
Ysu, v. to hanker, to itch, to eat, to corrode; to consume