Merthiad, n. an exhausting
Merthu, v. to exhaust, to wear out
Merthyr, n. what is open; a martyr
Merthyraeth, n. martyrology
Merthyrdod, n. martyrdom
Merthyriad, n. a martyring
Merthyru, v. to rack; to martyr
Meru, v. to droop; to drop
Merw, a. flaccid; flat; insipid
Merwin, n. numbness, torpidity