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陥る， 落ち入る， おちいる
1. to fall into (e.g. a hole)
2. to fall into (chaos, depression, dilemma, illness, etc.)
3. to fall into (a trap, etc.)
4. to fall, to surrender, to capitulate
掉进（例如一个洞里）；陷入（混乱、抑郁、困境、疾病等）；落入（陷阱等）
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陥没， かんぼつ
1. cave-in, collapse, sinking, depression (e.g. of the skull), subsidence
坍塌、崩塌、下沉、下陷；凹陷(例如颅骨的凹陷)
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欠陥， けっかん
1. defect, fault, flaw, deformity, deficiency, shortage, gap
缺陷、瑕疵