collapse

崩壊する、意気消沈する(共に滑り落ちる)

(verb-intransitive) To fall down or inward suddenly; cave in.
(verb-intransitive) To break down suddenly in strength or health and thereby cease to function: a monarchy that collapsed.
(verb-intransitive) To fold compactly: chairs that collapse for storage.
(verb-transitive) To cause to fold, break down, or fall down or inward.
(noun) The act of falling down or inward, as from loss of supports.

I like how Orlov claims that the Soviet collapse is exactly equal to the American collapse*.

collapsible-able

折りたためる（崩すことができる）

(時が)経過する(時がすべって行く) ◇ex＋laps

(時の)経過、誤り、手抜かり、推移する(手がすべる)

再び邪道、邪宗に返る、病気がぶりかえす(すべり返る)