Ymdwymno, v. to warm one’s self
Ymdynu, v. to pull mutually; to contend together
Ymddadwreiddio, v. to be eradicated; to self eradicate
Ymddangos, v. to appear
Ymddangosiad, n. an appearance
Ymddarostwng, n. self-debasement
Ymddeffroad, n. a self-waking
Ymddial, v. to revenge, to be revenged
Ymddialydd, n. an avenger
Ymddibynu, v. to hang by or upon, to depend