Σατανᾶς  [16 verses](noun sg masc nom) "Satan" is satanas, which is an Aramaic word meaning "adversary," "opponents," or "one who opposes another in purpose or act. " -- (UW) "Satan" is from an Aramaic word meaning "adversary" or "opponent." Jesus uses it to refer both to external opposition and our desire to make bad decisions.  See this article on the word and this article on this word and related terms.  - UW --Untranslated Word -- The word "satan" means "adversary." It is an untranslated Aramaic word adopted into English.