He 'kept/maintained his cool' [=he didn't get angry or upset] even though it was clear that he was being unfairly treated.
He was struggling to 'maintain his cool/composure'. [=he was struggling not to become angry or upset]
They barely had enough food to 'maintain life'. [=to make it possible for life to exist or continue]
(..) Well, of course it's not. I mean, if he was guilty, he'd be leaning back. Oh, right. Because kinesiology suggests that he'd maintain as much distance from his accuser as possible. Fascinating. to retrieve a partial image (..)2014 TvShow: Bones Title: The Master in the Slop Season: 9 Episode 14