/biˈnīn/
Adjective
1. (Medicine)
Not posing any serious threat to health; not particularly aggressive or recurrent. (wiktionary.org)
2. (Science: oncology)
Something that does not metastasise and treatment or removal is curative. (biology-online.org)
Word origin: From Old French benigne, from Latin benignus (“kind, good”), from bonus (“good”) + genus (“origin, kind”). Compare malign.