laid-back
adjective informal uk/ˌleɪdˈbæk/ us/ˌleɪdˈbæk/
C2 轻松的，悠闲的，不着急的
relaxed in manner and character; not usually worried about other people's behaviour or things that need to be done
I've never seen her worried or anxious in any way - she's so laid-back. 我从未见她着过急——她总是这样不慌不忙的。
Synonyms: chilled (RELAXED) mellow (RELAXED)relaxed (NOT WORRIED)