abruption (n.)

c. 1600, "a sudden breaking off," from Latin abruptionem (nominative abruptio) "a breaking off," noun of action from past-participle stem of abrumpere "break off," from ab "off, away from" (see ab-) + rumpere "to break," from a nasalized form of the PIE root *runp- "to break" (see corrupt (adj.)).