easygoing; carefree; optimistic; laid-back
Describes a person or attitude that is relaxed, unhurried, and not easily worried. Can be positive (optimistic, laid-back) or mildly negative (careless, thoughtless) depending on context.
He's always so easygoing; he doesn't panic even when the deadline is near.
This is no time to be taking it easy.
Even before the exam, he stays completely laid-back about it.
She has an easygoing personality and doesn't worry much.
He fished away leisurely, forgetting all about work.
He's been known as an easygoing sort of guy since way back.
おっとり describes a gentle, unhurried demeanor often seen as elegant or refined, while 呑気 emphasizes not worrying or rushing about things.
のんき describes a relaxed, unworried temperament in everyday behavior, while 楽天的 more specifically emphasizes a positive expectation that things will turn out well.
Search-only mixed kanji-kana form.
Search-only katakana form.
Rare kanji form; easily confused with 暖気 (だんき, warm air).