a. working successfully,effective 成功使用的，效力顯著的。 △ 2H.IV.1.1.127:“whose well-la-bouring sword / Had three times slain the appearanceof the king，” (To confuse the enemy Henry IV hadseveral noblemen wear the same dress as himself.Three were killed by Douglas.) 他那使用得力的大刀接連砍死了三個(gè)偽裝的國(guó)王。