To Fall Into
To Be Thrown Into
intransitive verb, godan verb
おちいる
陥る (おちいる) To Fall Into, To Be Thrown Into
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.