irradiate

 
Pronunciation: /ɪˈreɪdɪeɪt/

verb

[with object]
  • 1expose (someone or something) to radiation.
  • expose (food) to gamma rays to kill microorganisms.
  • 2illuminate (something) by or as if by shining light on it: happiness filled her, irradiating her whole face

Origin:

late 16th century (in the sense 'emit rays, shine upon'): from Latin irradiat- 'shone upon', from the verb irradiare, from in- 'upon' + radiare 'to shine' (from radius 'ray')