Vocabulary
Form
to be clear (of a sight, sound, colour, etc.); to be bright; to be vivid; to be crisp
verb
vi
N1
freq #900
Example sentences
昨日（きのう）ゆっくり休（やす）んだ分（ふん）、今日（きょう）は頭（あたま）が冴（さ）えている。
I feel smart today, to a degree that is in proportion to the amount of good rest I had yesterday.
満月（まんげつ）が空（そら）にさえている。
A full moon is shining bright in the sky.
彼女（かのじょ）は頭（あたま）のさえた人（ひと）だ。
She is a clear-headed.