lack of difficulty 容易；轻易；不费劲 - with ease
He passed the exam with ease. 他轻而易举地通过了考试。 The ease with which she learns languages is astonishing. 她学习语言之轻松令人惊讶。 - for ease of something
All important points are numbered for ease of reference (= so that you can find them easily). 全部重点均编了号码以便查阅。 This computer is popular for its good design and ease of use. 这种计算机因设计巧妙、简单易用而广受欢迎。
Extra ExamplesI obtained the drugs with alarming ease. 我轻而易举地弄到了这些毒品。 I was surprised at the apparent ease with which he got into the building. 他显然不费力地就进了大楼，这使我吃惊。 She returned her opponent's serve with contemptuous ease. 她不把对手放在眼里，轻而易举地回击了对手的发球。 The back of the garment is split for ease in walking. 衣服后面的开衩是为了行走方便。 The car brings ease of access to the countryside. 汽车方便了人们去乡间。
Oxford Collocations Dictionaryadjective- consummate
- great
- astonishing
- …
- for ease in
- for ease of
- with ease
- …
- with ease
the state of feeling relaxed or comfortable without worries, problems or pain 舒适；安逸；自在；无忧无虑
Word OriginMiddle English: from Old French aise, based on Latin adjacens ‘lying close by’, present participle of adjacere. The verb is originally from Old French aisier, from the phrase a aise ‘at ease’; in later use from the noun.
Idioms
(stand) at ease
used as a command to soldiers to tell them to stand with their feet apart and their hands behind their backs （对士兵的命令用语）稍息
at (your) ease
relaxed and confident and not nervous or embarrassed 舒适；自由自在；无拘无束 I never feel completely at ease with him. 我跟他在一起总感到不是很自在。 She was at her ease straight away in the new job. 她在新工作中很自在。
ill at ease
put somebody at (their) ease
to make somebody feel relaxed and confident, not nervous or embarrassed 使舒适；使自在；使不受拘束 Try to put the candidate at ease by being friendly and informal. 努力显得友好、随便，让应试者放松下来。
put/set somebody’s mind at ease/rest
to do or say something to make somebody stop worrying about something 安慰；宽解；使宽心