godan verb (-ru), intransitive verb
become bright; become clear
Archaic or literary intransitive verb meaning to brighten or become clear. In modern Japanese, this meaning is usually expressed by 明るくなる or 明るむ.
古語では「夜が明る」のように用いられた。
In classical language, it was used like 'the night brightens'.
Archaic or literary kanji spelling; modern Japanese normally uses 明るい (あかるい) for the adjective or 明るむ (あかるむ) for the intransitive verb.
Kana spelling of the archaic verb; rarely encountered outside classical texts.
Classical Japanese verb; the modern adjective 明るい and verb 明るむ derive from the same root. The exact historical derivation is uncertain.