1540s (trans.), 1560s (intrans.), variant of Middle English huisht (late 14c.), probably of imitative origin, with terminal -t lost probably by being mistaken for a past tense suffix. The sounds chosen presumably for "being sibilations requiring the least muscular effort and admitting of the faintest utterance" [Century Dictionary]. Related: Hushed; hushing.
Figurative use from 1630s. As an interjection meaning "be quiet," attested by c. 1600. To hush (one's) mouth "be quiet" is attested from 1878. Hush up "suppress talk for secrecy's sake" is from 1630s. Hush-money "bribe paid to ensure silence" is attested from 1709. Hush-puppy "deep-fried ball of cornmeal batter" first attested 1899; as a type of lightweight soft shoe, it is a proprietary name, registered 1961.
exclamation used to urge or request silence, 1847 (hush in this sense is from c. 1600). The gesture of putting a finger to the lips to express silence is attested from Roman times. As a transitive verb from 1887; intransitive from 1925.
in golf, c. 1891, originally "number of strokes a good player is supposed to need for a given hole or course;" later, "score one over par" (1946); from the same source as bogey (n.1), on the notion of a "phantom" opponent, represented by the "ground score." The word was in vogue at the time in Britain through the popularity of a music-hall tune "Hush, Hush, Hush, Here Comes the Bogey Man."
One popular song at least has left its permanent effect on the game of golf. That song is 'The Bogey Man.' In 1890 Dr. Thos. Browne, R.N., the hon. secretary of the Great Yarmouth Club, was playing against a Major Wellman, the match being against the 'ground score,' which was the name given to the scratch value of each hole. The system of playing against the 'ground score' was new to Major Wellman, and he exclaimed, thinking of the song of the moment, that his mysterious and well-nigh invincible opponent was a regular 'bogey-man.' The name 'caught on' at Great Yarmouth, and to-day 'Bogey' is one of the most feared opponents on all the courses that acknowledge him. [1908, cited in OED]
Other early golfing sources give it an American origin. As a verb, attested by 1948.
early 14c., lullen "to calm or hush to sleep," probably imitative of lu-lu sound used to lull a child to sleep (compare Swedish lulla "to hum a lullaby," German lullen "to rock," Sanskrit lolati "moves to and fro," Middle Dutch lollen "to mutter"). Figurative use from 1570s; specifically "to quiet (suspicion) so as to delude into a sense of security" is from c. 1600. Related: Lulled; lulling.