残
ザン, サン, のこ.る, のこ.す, そこな.う, のこ.り

remainder, leftover, balance

JLPT3 G4 S10 F380

As per 戔# (fine/slight) + 歹 severed bone/death → cut/strip flesh from bones, leaving only a slight remainder → *remain*; *leave behind*; *be left over* → *remainder*; *run short*; *small*; *cut into* → *cruel* (← cruel enough to cut/slash another; compare 殺 and 絶).

[Full Kanji Etymology List]