maroon

From French marron (“feral; fugitive”, adjective), from Spanish cimarrón (“fugitive, wild, feral”); see that entry for more.

Unknown. Possibly related to the sense “castaway” (etymology 1), or owing to the fact that the color of a fired flare was commonly red (etymology 2).

From an intentional mispronunciation of the word moron used by the cartoon character Bugs Bunny.