シツ 
うしな.う う.せる 
() lose
          
うしなう (v5u,vt) to lose, to part with
しつい (n,adj-no) disappointment, despair, adversity
しっかく (n,vs) disqualification, elimination, incapacity (legal)
しっきゃく (n,vs) losing one's standing, being overthrown, falling
しつぎょう (n,vs,adj-no) unemployment
しっけい (adj-na,int,n,vs) rudeness, saying good-bye, acting impolitely, stealing, impoliteness, disrespect, impertinence
しっさく (n,vs) blunder, slip, error
しっしん (n,vs,adj-no) faint, trance, swoon, stupefaction
しっせき (n,vs) absconding, disappearance
しっそく (n,vs) stall (in flying)
しったい (n) mismanagement, fault, error, failure, disgrace, discredit
しっつい (n,vs) abasement, fall, forfeiture, sinking (in people's estimation)
しってん (n) run charged to the pitcher
しっぱい (n,adj-no,vs) failure, mistake, blunder
しっぱいだん (n) failure story, horror story
しつぼう (n,vs) disappointment, despair
しつめい (n,vs) loss of eyesight
しつれい (n,vs,adj-na) (1) discourtesy, impoliteness, (exp) (2) Excuse me, Goodbye, (vs) (3) to leave, (4) to be rude
しつれん (n,vs) disappointed love, broken heart, unrequited love, being lovelorn

Links: KanjiDic: EDict : Wikimedia
Etymologies: 中文字譜 : 説文解字