Learn how to say Irradiated correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word irradiate:
(transitive) (physics) to subject to or treat with light or other electromagnetic radiation or with beams of particles
(transitive) to expose (food) to electromagnetic radiation to kill bacteria and retard deterioration
(transitive) to make clear or bright intellectually or spiritually; illumine
a less common word for radiate (sense 1)
(intransitive) (obsolete) to become radiant