辐射性 fúshèxìng radioactivity Origin Definitions Defs Strokes Stroke Words Sentences Sents 辐射 輻射 fúshè noun radiation radiation; to radiate or emit energy in the form of waves or particles, such as electromagnetic waves or radioactive decay.性 xìng affix [-ity] Suffix used after verbs or adjectives to form nouns expressing a state, quality, or scope, similar to English "-ity", "-ness", or "-ism".