To Cave In
To Collapse, To Fall, To Trap
intransitive verb, godan verb
おちいる
陥る (おちいる) To Cave In, To Collapse, To Fall, To Trap
陥没 (かんぼつ) Cave In, Collapse, Sinking, Depression
用いる (もちいる) To Utilize, To Use
Oh お chill ちいる, it's just a Cave In.