カイ、エ
こわ.す、こわ.れる、やぶ.る
壊, 土, 十, 罒, 衣, 亠
土
demolition, break, destroy
崩壊(ほうかい): (1) collapse; crumbling; breaking down; caving in (2) decay (physics)
破壊(はかい): (1) destruction; disruption (2) (application) crash
壊す(こわす): (1) to break; to destroy; to demolish (2) to wreck; to ruin; to spoil; to damage (3) to break (a bill, etc.)
壊れる(こわれる): (1) to be broken; to break (2) to fall through; to come to nothing