Sefydliad, n. an establishing
Sefydlog, a. standing; stationary
Sefydlu, v. to establish, to settle
Sefydlyn, n. stagnant water
Sefyll, n. a standing, a position: v. to stand; to stop
Sefyllfa, n. a standing place
Sefyllfod, n. station, situation
Sefylliad, n. stationing
Sefyllian, v. to stand often, to loiter
Sefylliant, n. a stationing