意気阻喪[ikisosou] depressed in spirits
喪う[ushinau] to lose
喪家[souka] homeless
喪具[sougu] funeral accessories
喪祭[sousai] funerals and festivals

喪失[soushitsu] loss
喪主[moshu] chief mourner
喪章[moshou] sign of mourning
喪心[soushin] absent-mindedness

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