-ive-ive /ɪv/ suffix [in nouns and adjectives] 
someone or something that does something or can do something: 
an explosive (=substance that can explode) a detective (=someone who tries to discover facts about crimes) the adoptive parents (=who adopt a child)
someone or something that does something or can do something: an explosive (=substance that can explode) a detective (=someone who tries to discover facts about crimes) the adoptive parents (=who adopt a child)