a|brupt [ ə`brʌpt ] adjective
1. ) sudden and unexpected, often in an unpleasant way:
Our friendship came to an abrupt end.
2. ) behaving or speaking in a way that seems rude to other people because you do not take the time to be friendly:
The sales clerks were abrupt and impatient with the customers.
╾ a|brupt|ly adverb
╾ a|brupt|ness noun uncount

Usage of the words and phrases in modern English. 2013.