IPA: /ˌreɪdiəʊprəˈtɛkʃən/
KK: /reɪdiəʊprəˈtɛkʃən/
A method or process that protects living organisms from the harmful effects of radiation.
Radioprotection measures are essential for workers in nuclear power plants.
Radioprotection → It is formed from "radio-" (from Latin *radius*, meaning ray) and "protection" (from Latin *protectio*, meaning a covering or defense). The word refers to the act of protecting against harmful rays, particularly radiation.
Think of 'rays' ('radio-') that need 'defense' ('protection') — that's why radioprotection means protecting against harmful rays.