"coloring matter in solution," Middle English deie, from Old English deah, deag "a color, hue, tinge," from Proto-Germanic *daugo (source also of Old Saxon dogol "secret," Old High German tougal "dark, hidden, secret," Old English deagol "secret, hidden; dark, obscure," dohs, dox "dusky, dark").
also red-wood, 1610s, "wood that has a red hue," from red (adj.1) + wood (n.). Of various types of New World trees that yield such wood, from 1716; specifically the California Sequoia sempervirens from 1819. In Scottish English 16c.-18c. the same word as an adjective meant "completely deranged, raving, stark mad," from wood (adj.).
1819, "ten-legged animal, type of crustacean having ten legs" (crabs, lobsters, shrimp), from French décapode (1806), from Modern Latin Decapoda (animalia), from Greek dekapoda, neuter plural of dekapous "ten-footed" (see ten + foot (n.)). From 1885 in reference to a type of locomotive with ten driving-wheels.
word-forming element meaning "wood, forest," also "matter," from Greek hylos "a wood, a forest, woodland; wood, firewood, timber; stuff, material," used by Aristotle for "matter" in the philosophical sense; a word of unknown origin.
"long-tailed, ten-footed shrimp-like crustacean, abundant on the shores of the British Isles," early 15c., prayne, a word of unknown origin. "No similar name found in other langs." [OED].