still (adj.)

Old English stille "motionless, stable, fixed, stationary," from Proto-Germanic *stilli- (source also of Old Frisian, Middle Low German, Middle Dutch stille, Dutch stil, Old High German stilli, German still), from PIE *stel-ni-, suffixed form of root *stel- "to put, stand, put in order," with derivatives referring to a standing object or place. Meaning "quiet, calm, gentle, silent" emerged in later Old English. Euphemistic for "dead" in stillborn, etc. Still small voice is from KJV:

And he said, Go forth, and stand upon the mount before the LORD. And, behold, the LORD passed by, and a great and strong wind rent the mountains, and brake in pieces the rocks before the LORD; but the LORD was not in the wind: and after the wind an earthquake; but the LORD was not in the earthquake: and after the earthquake a fire; but the LORD was not in the fire: and after the fire a still small voice. [I Kings xix.11-13]

Used as a conjunction from 1722.

still (n.1)

"distilling apparatus," 1530s, from Middle English stillen "to distill" (c. 1300), a variant of distillen (see distill).

still (v.)

Old English stillan "to be still, have rest; to quiet, calm, appease; to stop, restrain," from stille "at rest" (see still (adj.)). Cognate with Old Saxon stillian, Old Norse stilla, Dutch, Old High German, German stillen. Related: Stilled; stilling.

still (n.2)

c. 1200, "a calm," from still (adj.). Sense of "quietness, the silent part" is from c. 1600 (in still of the night). Meaning "a photograph" (as distinguished from a motion picture) is attested from 1916.

still (adv.)

"even now, even then, yet" (as in still standing there), 1530s, from still (adj.) in the sense "without change or cessation, continual" (c. 1300); the sense of "even, yet" (as in still more) is from 1730.

Definitions of still
still (adj.)
not in physical motion;
Synonyms: inactive / motionless / static
still (adj.)
marked by absence of sound;
the night was still
Synonyms: silent / soundless
still (adj.)
(of a body of water) free from disturbance by heavy waves;
scarcely a ripple on the still water
Synonyms: placid / quiet / tranquil / smooth / unruffled
still (adj.)
used of pictures; of a single or static photograph not presented so as to create the illusion of motion; or representing objects not capable of motion;
Cezanne's still life of apples
a still photograph
still (adj.)
not sparkling;
still mineral water
a still wine
Synonyms: noneffervescent
still (adj.)
free from noticeable current;
still waters run deep
a still pond
still (v.)
make calm or still;
Synonyms: calm / calm down / quiet / tranquilize / tranquillize / tranquillise / quieten / lull
still (v.)
cause to be quiet or not talk;
Synonyms: hush / quieten / silence / shut up / hush up
still (v.)
lessen the intensity of or calm;
still the fears
Synonyms: allay / relieve / ease
still (v.)
make motionless;
still (n.)
a static photograph (especially one taken from a movie and used for advertising purposes);
he wanted some stills for a magazine ad
still (n.)
(poetic) tranquil silence;
the still of the night
Synonyms: hush / stillness
still (n.)
an apparatus used for the distillation of liquids; consists of a vessel in which a substance is vaporized by heat and a condenser where the vapor is condensed;
still (n.)
a plant and works where alcoholic drinks are made by distillation;
Synonyms: distillery
still (adv.)
with reference to action or condition; without change, interruption, or cessation;
it's still warm outside
will you still love me when we're old and grey?
still (adv.)
despite anything to the contrary (usually preceding a concession);
granted that it is dangerous, all the same I still want to go
Synonyms: however / nevertheless / withal / yet / all the same / even so / nonetheless / notwithstanding / at the same time
still (adv.)
to a greater degree or extent; used with comparisons;
an even (or still) more interesting problem
still another problem must be solved
Synonyms: even / yet
still (adv.)
without moving or making a sound;
he sat still as a statue
they waited stock-still outside the door
he couldn't hold still any longer
time stood still
Synonyms: stock-still