Tydain, n. Titan, the sun
Tydi, pron. thou, thyself
Tyddfiad, n. a poking; a jutting
Tyddfu, v. to poke; to jut
Tyddiad, n. a spreading out
Tyddyn, n. a farm; a tenement
Tyfid, n. a growing, a growth
Tyfannu, v. to vegitate
Tyfiant, n. vegitation, growth
Tyfol, a. growing; vegitating