adj .
unnecessary ; irrelevant ; extra 불필요한 ; 관계없는 ; 여분의

• The be extraneous is to be extra, but always with the sense of being unnecessary. Extra a ice cream would never be extraneous, unless everyone had already eaten so much that no one wanted any more.
• The book's feeble plot was buried in a lot of extraneous material about a talking dog.
• The soup contained several extraneous ingredients, including hair, sand, and a single dead fly.