lapsed
词根词缀：
collapse v. 倒塌；崩溃
col 共同 + laps 滑，滑走 + e → 一起滑落 → 倒塌
elapse v. （时光）流逝
e 加强 + laps 滑，滑走 + e → 滑走 →〔时光〕流逝
lapse v. 堕落；犯错误
laps 滑，滑走 + e → 堕落；犯错误
lapse n. 失误，差错
lapsed adj. 不再使用的；过时的
laps 滑，滑走 + ed 表形容词 → 从潮流中溜过 → 过时的
relapse v. （病）复发；（罪）累犯
re 重新 + laps 滑，滑走 + e → 重新滑落 →〔病〕复发
数据来源：新东方英语词汇速记大全
相关例句：
Her right to the property has lapsed.
她的财产权失效了。
She lapsed into silence again.
她又陷入了沉默。
His claim to the land lapsed because he forgot to pay the rent.
他对那块土地的要求权沦丧了，因为他忘了付租金。
He soon lapsed into his previous bad habits.
很快地他又养成了以前的那些坏习惯。
Doris Brown closed her eyes and lapsed into sleep.
多丽丝·布朗闭上眼睛，安然入睡。
There was some fatal flaw in his makeup, and as time went on he lapsed into long silences or became off-hand.
他的性格有致命的缺陷，随着时间的推移，他陷入了久久的沉默，或者变得漠然。