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Definitions of abrupt:

adjective:   marked by sudden changes in subject and sharp transitions
Example: "Abrupt prose"

adjective:   surprisingly and unceremoniously brusque in manner
Example: "An abrupt reply"

adjective:   exceedingly sudden and unexpected
Example: "Came to an abrupt stop"

adjective:   extremely steep
Example: "An abrupt canyon"

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Alternative Terms
short suddenly fast-slow-velocity abruptly-suddenly-short-dead dead abrupt deflexed snatchingly reflexed-botany gradually-2 snatcher-4 apiculate butte geniculate mucronate paroxysmal-atrial-tachycardia cancer-therapy-palliative-risks stepped-column sec

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