Origin of gladden; from glad + -en
verbglad·dened, glad·den·ing, glad·dens
verb, intransitive Archaic
(third-person singular simple present gladdens, present participle gladdening, simple past and past participle gladdened)
- To cause (something) to become more glad.
- (intransitive, archaic) To become more glad in one's disposition.
From glad + -en.