Pleonasm is a rhetorical figure where redundancy is used to reinforce an idea. They are usually two or more words in the same sentence with equal meaning, or that the concept of one contains the other. While it is a stylistic resource, it is also said when redundancy is by mistake in the construction of the sentence, and reiteration is unnecessary. It comes from the Greek 960; 955; 949; 959; 957; ( plethon "excess, fullness" ) the active reinforcement suffix - 945; 963; 956; 959; 962; ( -asmós ) .