1823, from assimilated form of in- (1) "not, opposite of" + practical (adj.). Impracticable in the same sense dates from 1670s; unpractical is rare. Related: Impractically.
refloating the ship proved impractical because of the expense
he is intelligent but too impractical for commercial work
an impractical solution
impound
impoundment
impoverish
impoverishment
impracticable
impractical
impracticality
imprecate
imprecation
imprecise
imprecision
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