able

adj.①能,能够[+to do sth.]:I was able to try new activities and test my ability.（湖南高考）

【搭配】be able to能,能够

【联想串记】unable adj. 未能,无法

disable  vt. 使丧失能力,使伤残,使无效

ably  adv.能干地 

enable  vt.使有机会,使能够