Meistrolaeth, n. mastery
Meistrolaethu, v. to get mastery
Meistroll, v. to sway as master
Meityn, n. a point, a space
Meithdra, n. tediousness
Meithio, v. to make tedious
Meithiw, a. extensive, tedious
Meithrin, n. nurture, nursing: v. to nourish
Meithrinfa, n. a seminary
Meithriniad, n. a nurturing