at ease

without strain or anxiety

• “gave the impression of being quite relaxed”
• “a relaxed and informal discussion”

free from worry or anxiety

• “knowing that I had done my best, my mind was easy”
• “an easy good-natured manner”
• “by the time the chsild faced the actual problem of reading she was familiar and at ease with all the elements words”

socially at ease

• “was at ease with strangers”

in a relaxed position, of soldiers

• “the soldiers were standing at ease”