脱垂 is read as だっすい (dassui) and means prolapse.
だっすい
dassui
だつい
undressing
だっしゅつ
escape
だつぜい
tax evasion
だったい
withdrawal (e.g. from an organization)
だついじょ
changing room (at a bathhouse, swimming pool, etc.)
evaporation
だつらく
falling off
だっそう
だっせん
derailment
ぬぐ
to take off (clothes, shoes, etc.)
だっきゃく
ridding oneself
だっぴ
freeing oneself