at ease

Từ điển Oxford Advanced Learner 8th

▪ I. (stand) at ˈease idiom
used as a command to soldiers to tell them to stand with their feet apart and their hands behind their backs
compare ↑attention _n. (⁵)
Main entry: ↑ease_idiom
 
▪ II. at (your) ˈease idiom
relaxed and confident and not nervous or embarrassed
•I never feel completely at ease with him.
•She was at her ease straight away in the new job.
Main entry: ↑ease_idiom