well-rested

Having had sufficient (or even more than enough) sleep or rest to function optimally during waking hours.

Japanese Meaning

十分な睡眠や休息を取って、日中の活動において最適な状態にあることを示す

ぐっすり眠って穏やかな朝の散歩をした後、彼は十分に休養が取れてここ数週間で最も集中していた。

Sense（1）

Having had sufficient (or even more than enough) sleep or rest to function optimally during waking hours.

more well-rested

（ comparative ）

most well-rested

（ superlative ）