Answer: abrupt

AnswerCrossword Clue
ABRUPTSudden.
abruptcurt
abruptsudden
abruptan abyss (a bottomless chasm) / short and rude in manner
abruptsteep
ABRUPTSurprisingly curt
ABRUPTNot flowing
ABRUPTBrusque in manner
ABRUPTPrecipitous
ABRUPTShort, but not necessarily sweet
ABRUPTUnceremonious
ABRUPTPrecipitate
ABRUPTSteeply inclined
ABRUPTSteep
ABRUPTRather sudden
ABRUPTBroken off.
ABRUPTUnexpected.
ABRUPTEnding suddenly
ABRUPTHasty
ABRUPTShort
ABRUPTShort-spoken
ABRUPTWithout warning
ABRUPTCurt
ABRUPTUnceremoniously curt
ABRUPTDiscourteously curt
ABRUPTBrusque
ABRUPTUnexpected
ABRUPTSudden