陥 collapse, fall into, cave in, fall (castle), slide into 10 strokes jōyō, taught in secondary school old JLPT 1 #1154 in newspapers Readings Onカン Kunおちい.る、おとしい.れる In Chinese 陷 Words written with it 欠陥 けっかん defect N3 陥落 かんらく subsidence 陥没 かんぼつ cave-in 陥る おちいる to fall into (e.g. a hole)