枯死 is read as こし (koshi) and means withering.
こし
koshi
こぼくしかい
withered trees and cold ash
かれき
dead tree
かれは
dead leaf
かれる
to mature (of one's personality, abilities, etc.)
かれくさ
dry grass
かれえだ
dead branch (or twig, etc.)
のうし
brain death
むし
no outs
とうし
death from cold
しょうし
death by fire
あっし
death by crushing
ばくし
bombing (in sales)