relaxed; carefree; comfortable; unconstrained
Describes a person, manner, voice, movement, or atmosphere that feels free, relaxed, and not cramped or tense. Often used as 伸びやかな, 伸びやかに, or 伸びやかだ.
The children are playing freely in the spacious schoolyard.
Her relaxed, free-flowing singing voice echoed through the hall.
He grew up in nature, free and unconstrained.
She sang with a relaxed, open voice.
He has such an easygoing, unconstrained personality that everyone likes him.
This school has a relaxed, open atmosphere.