-cide-cide /saɪd/ suffix [in nouns] 
another form of the suffix -icide: 
genocide (=killing a whole race of people)—-cidal [in adjectives]—-cidally [in adverbs]
another form of the suffix -icide: genocide (=killing a whole race of people)—-cidal [in adjectives]—-cidally [in adverbs]