Ambushing

an act or instance of lying concealed so as to attack by surprise:
the highwaymen waited in ambush near the road.
an act or instance of attacking unexpectedly from a concealed position.
the concealed position itself:
they fired from ambush.
those who attack suddenly and unexpectedly from a concealed position.
to attack from ambush.
contemporary examples

early scenes show her in an all-white suit, ambushing an -ss-ssin.
the cia spook turned comic book scribe: robin grabs a gun in ‘grayson’ rich goldstein june 23, 2014

a police spokesman said it had received reports the npa “has been invading villages and ambushing relief goods” in the region.
typhoon haiyan tacloban leaders calls on rebels to avoid armed violence the telegraph november 13, 2013

historical examples

his uniform was generally yellow, and he was in the habit of ambushing in yellow flowers.
old farm fairies: henry christopher mccook

the mischief was individual now, and ambushing was more common.
the last stetson john fox jr.

he thought of turning his horse loose and ambushing the mountainmen, afoot.
partners of chance henry herbert knibbs

finally they got discouraged trying to fight blant in the open, and tuck to ambushing.
mothering on perilous lucy s. furman

between the two parties was a willow-bordered creek toward which each started for the apparent purpose of ambushing the other.
the spirit lake m-ssacre thomas teakle

they had failed in their first effort at ambushing the cut, and casey knew the troops would prevent a second attempt.
the u.p. trail zane grey

true, many of the tribesmen were accomplished tree-climbers, often ambushing game from their branches.
warrior of the dawn howard carleton browne

three or four men, and as many horses were slain; but the ambushing body was outnumbered, and several of its members killed.
campaigns of a non-combatant, george alfred townsend

noun
the act of waiting in a concealed position in order to launch a surprise attack
a surprise attack from such a position
the concealed position from which such an attack is launched
the person or persons waiting to launch such an attack
verb
to lie in wait (for)
(transitive) to attack suddenly from a concealed position
v.

c.1300, from old french embuscher (13c., modern french embûcher) “to lay an ambush,” from en- “in” + busch “wood,” apparently from frankish -busk “bush, woods” (see bush (n.)). related: ambushed; ambushing.
n.

late 15c., embushe, from the english verb or from middle french embusche, from old french embuscher (see ambush (v.)). earlier was ambushment (late 14c.). figurative use by 1590s.

joshua at the capture of ai lay in ambush, and so deceived the inhabitants that he gained an easy victory (josh. 8:4-26). shechem was taken in this manner (judg. 9:30-45. comp. jer. 51:12).