动

1. (= 倒塌) collapse
2. (= 凹下) sink (pt sank) (pp sunk)
   ⇒ 他瘦得连双颊都塌下去了。 (Tā shòu de lián shuāngjiá dōu tā xiàqù le.) He's got so thin that even his cheeks are sunken.
3. (= 安定) settle down