отмахну́ть

verbperfective (partner отма́хивать)rare

1.
to wave away, to shoo away, to brush off (an insect)
Он отмахну́л муху от лица.
He waved a fly away from his face.
Perfective; of a single sweeping movement of the hand.
2.
(rare) to cover (a distance), to do (so many kilometres)
За день мы отмахну́ли сто километров.
We covered a hundred kilometres in a day.
Colloquial: of covering a long stretch in one go.
3.
(rare) to knock off (quickly), to get done in no time
Он отмахну́л всю работу за час.
He knocked off all the work in an hour.
Colloquial: of finishing a task fast.

Examples

Он отмахнул от лица надоедливую муху.
He waved the annoying fly away from his face.
Мальчик отмахнул ветку, чтобы пройти по тропе.
The boy pushed a branch aside to get along the path.
Она отмахнула комара рукой и пошла дальше.
She swatted the mosquito away with her hand and continued on her way.

Imperative
ты	отмахни́
вы	отмахни́те

Active present	-
Active past	отмахну́вший	having brushed off, having waved away, having dismissed, having shrugged off
Passive present	-
Passive past	отма́хнутый	waved away, brushed off, fended off
Gerund present	-
Gerund past	отмахну́в отмахнувши	while doing (past)

махну́тьto wave; to swing; to give up on; to dash off; to leap; to knock back (a drink); to swap
verbperfective
взмахну́тьto wave
verbperfective
махнутьсяto swap
verbperfective
обмахну́тьto fan
verbperfective
подмахну́тьto sign hastily; to give a quick sweep
verbperfective