Origin: bef. 900; (adj. and adv.) ME
still(
e), OE
stille; (n.) ME: a calm, deriv. of the adj.; (v.) ME
styllen, OE
stillan; (conj.) deriv. of the adv.; akin to G
still (adj.),
stille (adv.),
stillen (v.), D
stil (adj. and adv.),
stillen (v.);
see stall 1 
Synonyms:1. unmoving, inert, quiescent.
2. soundless, mute.
Still, quiet, hushed, noiseless, silent indicate the absence of noise and of excitement or activity accompanied by sound.
Still indicates the absence of sound or movement:
The house was still. Quiet implies relative freedom from noise, activity, or excitement:
a quiet engine; a quiet vacation. Hushed implies the suppression of sound or noise:
a hushed whisper. Noiseless and
silent characterize that which does not reveal its presence or movement by any sound:
a noiseless footstep; silent dissent. 4. pacific, placid, serene.
8. quiet, hush, calm.
18. See but 1 . 19. quiet, mute, stifle, muffle, smother.
20. soothe, pacify.