"wood floating on water," 1630s, from drift (v.) + wood (n.).
Entries linking to driftwood
drift v.
late 16c., "to float or be driven along by a current," from drift (n.). Transitive sense of "to drive in heaps" is from 1610s. Figurative sense of "be passive and listless" is from 1822. Related: Drifted; drifting. To drift apart "gradually lose mutual affection" is by 1859.
wood n.
Old English wudu, earlier widu "tree, trees collectively, forest, grove; the substance of which trees are made," from Proto-Germanic *widu- (source also of Old Norse viðr, Danish and Swedish ved "tree, wood," Old High German witu "wood"), from PIE *widhu- "tree, wood" (source also of Welsh gwydd "trees," Gaelic fiodh- "wood, timber," Old Irish fid "tree, wood"). Out of the woods "safe" is from 1792.