Abrupt

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late 16th century: from Latin abruptus ‘broken off, steep’, past participle of abrumpere, from ab- ‘away, from’ + rumpere ‘break’.

wiktionary

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First attested in 1583. Borrowed from Latin abruptus(“broken off”), perfect passive participle of abrumpō(“break off”), formed from ab(“from, away from”) + rumpō(“to break”). [1] [2]

etymonline

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abrupt (adj.)

1580s, "sudden, unceremonious, without notice," a figurative use from Latin abruptus "broken off," also "precipitous, steep" (as a cliff), also "disconnected," past participle of abrumpere "break off," from ab "off, away from" (see ab-) + rumpere "to break," from a nasalized form of the PIE root *runp- "to snatch" (see corrupt (adj.)). The literal sense "broken off or appearing as if broken off" is from c. 1600 in English. Of writing, "having sudden transitions, lacking continuity," 1630s. Related: Abruptly; abruptness.