Marworyn, n. ember
Marw-wystl, n. a mortgage
Marwydos, n. embers
Marwysgafn, n. death-bed song
Marwysgar, n. a death parting
Mas, n. a swoon; ecstacy
Masaidd, a. tending to faint
Masarn, n. the sycamore
Masarnen, n. a sycamore
Masawd, n. a swooning, a fainting