sidelong, a. lateral, oblique.
sidesman, n. [partisan].
sidetrack, v. shunt; (Colloq.) switch off, divert.
sideways, adv.. [sidewise], [askance], obliquely, laterally.
sidewise, adv. [sideways], [askance].
siding, n. [sidetrack], turnout; [clapboards], weatherboarding.
siege, n. investment, blockade, besiegement. Associated words: obsidional, [besiege], beleaguer, obsess, obsession, [beset].
Siena marble. brocatel.
sieve, n. [strainer], sifter, [bolt], bolter, [riddle], tammis, tammy.
sievelike, a. cribrate, cribrose, cribriform.