Sedd, n. a motionless state; a seat
Sedda, v. to sit habitually
Seddiad, n. a seating, a sitting
Seddof, n. a sofa
Seddoldeb, n. sedentariness
Seddu, v. to seat; to be seated
Sef, a. certain, being true: conj. that is to say; namely
Sefnig, n. the gullet, the swallow
Sefyd, v. to stand; to stop still
Sefydledig, a. stationed, settled, established