stern

[1]	after part , quarter , poop , tail
[2]	Isaac Stern
[3]	buttocks , nates , arse , butt , backside , bum , buns , can , fundament , hindquarters , hind end , keister , posterior , prat , rear , rear end , rump , seat , tail , tail end , tooshie , tush , bottom , behind , derriere , fanny , ass

adj.

[1]	austere , severe , strict , stringent , demanding , critical , rigid , rigorous , flinty , steely , authoritarian , uncompromising , hard , tough , inflexible , firm , immovable , unmoved , unrelenting , unremitting , steadfast , resolute , determined , unyielding , adamant , adamantine , obdurate , hard-hearted , stony , stony-hearted , unsparing , unforgiving , unsympathetic , harsh
[2]	serious , frowning , grim , forbidding , grave , gloomy , dour , sombre , saturnine , lugubrious , gruff , taciturn , crabby , crabbed , crusty , churlish , sour
[3]	austere
[4]	grim , inexorable , relentless , unappeasable , unforgiving , unrelenting
[5]	strict , exacting
[6]	austere , severe , stark