able
词根词缀：
ability n. 能力
abil 能 + ity 具备某种性质，状况 → 能力
able adj. 能够的
debility n. 虚弱
de 去掉 + bility〔=ability〕能力 → 使能力失掉 → 虚弱
debilitate v. 使衰弱
de 去掉 + bilit〔= abili〕能 + ate 做，造成，使… → 去掉能力 → 使衰弱
habilitate v. 装备；使具备能力
habilit〔= abili〕能 + ate 做，造成，使… → 装备；使具备能力
rehabilitate v. 使康复；改造（罪犯）
re 重新 + habilitate 装备；使具备能力 → 重新获得能力 → 使康复
数据来源：新东方英语词汇速记大全
相关例句：
He was able to sever all emotional bonds to his family.
他切断了和家人的所有感情纽带。
This year we won't even be able to buy presents for our grandchildren. It's heartbreaking.
今年我们甚至无法给自己的孙儿辈买礼物了。这真让人心碎。
They'll be able to furnish you with the rest of the details.
他们将可向你提供其余的细节。
Parents will be able to discuss their child's progress with their teacher
家长将可以和老师交流谈论子女的进步情况。
You'll be able to read in peace
你就能安心地读书了。
You have to be able to describe things in a form that the end user can understand.
你必须以终端用户可以理解的方式描述产品。