ETYM Latin abruptus, p. p. of abrumpere to break off; ab + rumpere to break. Related to Rupture.
1. Exceedingly sudden and unexpected.
2. Extremely steep; SYN. precipitous, sharp.
3. Marked by sudden changes in subject and sharp transitions; SYN. disconnected.
4. Surprisingly and unceremoniously brusque in manner.
1. Lacking accompaniment or a guard or escort.
2. Not watched.
1. Causing surprise or amazement by not being expected
2. Happening or coming quickly and without warning; SYN. unforeseen.
3. Not expected or anticipated
4. Not foreseen
5. Not planned
Not foreseen, unanticipated, unexpected
In a way that was not expected; SYN. out of the blue.