Old English siðe, sigði, from Proto-Germanic *segithoz (cf. Middle Low German segede, Middle Dutch sichte, Old High German segensa, German Sense), from PIE root *sek- "to cut" (see section (n.)). The sc- spelling crept in early 15c., from influence of Latin scissor "carver, cutter" and scindere "to cut." Cf. French scier "saw," a false spelling from sier.