godan verb (-ru), intransitive verb
become still greater; increase further
Archaic or highly literary intransitive verb meaning to grow even more intense, abundant, or excellent. Rarely used in modern Japanese outside classical texts or poetic contexts.
古典では、苦しみがいやまさる場面が描かれる。
In classical literature, scenes where suffering becomes still greater are depicted.
Literary kanji spelling; the word itself is rare and archaic.
Kana spelling for this rare, archaic verb.
Compound of 弥 (いや, 'more and more') and 増さる (まさる, 'to increase'), an archaic intransitive verb. The exact historical derivation is uncertain, but it follows a classical pattern of intensifying prefixes.