Antre is a 5 letter English word. It's valid Scrabble word worth 5 points. It's valid Words with friends word worth 6 points.
You can make 80 anagrams from letters in antre (aenrt).
1595-1605; Middle French Latin antrum. See antrum
antre is a generic term for cave, and as trou means hole, the word antrou is also equivalent to old hole.
Note the antithesis in the same line, antre de rois, Louvre de voleurs.