[xiàn luò]
(下陷沉降) subside; sink in; cave in
subsidence of the earth's crust
地壳的陷落
(沦陷) fall into enemy's hands
The fort fell into the enemy's hands without a shot being fired.
一枪未发堡垒就陷落敌手。
(落在不利的境地) sink [fall] into; land oneself in
[地质] foundering; depression