Толковый словарь английского языка Oxford English Reference - ambush

n. & v. --n. 1 a surprise attack by persons (e.g. troops) in a concealed position. 2 a the concealment of troops etc. to make such an attack. b the place where they are concealed. c the troops etc. concealed. --v.tr. 1 attack by means of an ambush. 2 lie in wait for. Etymology: ME f. OF embusche, embuschier, f. a Rmc form = 'put in a wood': rel. to BUSH(1)