1.
calm, composed, unhurried, leisurely
Describes a relaxed, unhurried state of mind or manner, especially remaining calm and unperturbed regardless of circumstances. Often implies a dignified ease.
Adjective type: Na-adjective/adverb. Most commonly used adverbially as 悠然と.
Adverbial form: 悠然と (calmly, leisurely, composedly)
Nuance: 悠然 suggests an elegant, dignified calmness with an unhurried quality. It implies being above petty concerns and maintaining composure with grace.