double-barrelled
adjective(US English double-barreled)
[usually before noun](of a gun 枪 having two barrels (= places where the bullets come out) 双管的 - (British English)
(of a family name 姓 having two parts, sometimes joined by a hyphen, for example ‘Day-Lewis’ 由两部分组成的 (of a plan, etc. 计划等 having two parts, and therefore likely to be effective 双重目的的；双作用的