遺失[ishitsu] loss
遺失物[ishitsubutsu] lost article
一失[isshitsu] disadvantage (defect, error)
一得一失[ittokuisshitsu] gaining some and losing some
栄養失調[eiyoushicchou] malnutrition

過失[kashitsu] error
見失う[miushinau] to lose sight of
失う[ushinau] to lose
失する[shissuru] to lose
失せる[useru] to disappear

右折禁止[usetsukinshi] No Right Turn!
化学兵器禁止条約[kagakuheikikinshijouyaku] chemical weapons ban treaty
解禁[kaikin] lifting a ban
監禁[kankin] confinement
禁じる[kinjiru] to prohibit

禁ずる[kinzuru] to forbid
禁烟[kinen] abstaining from smoking
禁煙車[kinensha] non-smoking car
禁忌[kinki] taboo
禁漁[kinryou] prohibition of fishing