What does irrădĭo mean in Latin?

irrădĭo, a verb, means “to illumine”.

verb

irrădĭo

irrădĭo (inr-), āre, v. a. and n. 1. inradio,

I. to illumine, irradiate; to beam forth, cast forth rays (poet. and post-class.).

I. Act.

A. Lit.: hoc undique gemmae irradiant, Stat. Th. 6, 64.—

B. Trop.: artes Romanis floribus, Claud. Cons. Mall. Theod. 84.—

II. Neutr.: coeperat felix Irradiare dies, to dawn, break, Sedul. 5, 315; Ambros. Apol. Dav. 8, § 45.