Sur-ren-der, rhoddiad i fynu; traddodi, ymroddi
Sur-ro-gate, rhaglaw esgob
Sur-round-ing, amgylchynol, cylchynol
Sur-vey-or, arolygydd; mesurydd
Sur-viv-or, gorfucheddwr
Sus-pect-ing, drwgdybus, amheus
Sus-pen-sion, crogiad; dodiad heibio
Sus-pi-cion, drwgdyb; amheuad
Sus-pi-cious, drwgdybus, amheugar
Sus-te-nance, ymborth, cynnaliaeth