Sidera, v. to form twirls
Sideru, v. to twirl; to fringe
Sidi, n. state of revolving. Caer sidi, the zodiac
Sidin, a. winding, revolving
Sidydd, n. zodiac, ecliptic
Sidyll, n. a whirl, a twirl; a rim
Siff, n. an intermitting noise
Siffro, v. to rustle, to murmur
Sig, n. a shatter, a bruise
Sigiad, n. bruising, shattering