Ystrancus, a. apt to play tricks
Ystrawu, to educate; to mature
Ystre, n. a course, a range
Ystred, n. a village, a hamlet
Ystref, n. what forms a dwelling
Ystreigio, v. to turn, to roll
Ystreillach, n. trundling
Ystreillio, v. to trundle
Ystrem, n. what is made to appear
Ystremio, v. to make to seem