死す is read as しす (shisu) and means to die.
しす
shisu
しりょくをつくす
to make frantic efforts
しにん
corpse
しぬ
to cease
したい
dead body
ししゃ
dead person
しきょ
death
しせい
life and death
しご
dead language
し
(an) out
after death
しにたい
hopeless situation
しかい
Dead Sea