Hendiadys

Hendiadys ( /hɛnˈdaɪ.ədɨs/; a Latinized form of the Greek phrase ἓν διὰ δυοῖν, hèn dià duoîn, "one through two") is a figure of speech used for emphasis — "The substitution of a conjunction for a subordination". The basic idea is to use two words linked by a conjunction to express a single complex idea.