lapsed adj.

early 15c., to go by, pass (of time), from lapse (n.) and from Latin lapsare "to lose one's footing, slip, slide," from stem of labi "to slip, glide, fall." Meaning "fail in duty or faith" is from 1630s. Meaning "become void, revert due to some failure or non-action by the holder" is from 1726. Related: Lapsed; lapses; lapsing.

1732, "fall together, fall into an irregular mass through loss of support or rigidity," from Latin collapsus, past participle of collabi "fall together," from assimilated form of com "with, together" (see com-) + labi "to fall, slip" (see lapse (n.)).

Figurative sense of "come to nothing, fail" is from 1801. Transitive sense "cause to collapse" is from 1883. The adjective collapsed is attested from c. 1600, originally of groups of persons, "fallen from a spiritual or religious state," perhaps from co- + lapsed. Related: Collapsing.