den

From Middle English den, from Old English denn (“den, lair (of a beast), cave; a swine-pasture, a woodland pasture for swine”), from Proto-West Germanic *dani (“threshing-floor, barn-floor”). Cognate with Scots den (“den, lair”), Middle Dutch denne (“burrow, den, cave, attic”), Dutch den (“ship's deck, threshing-floor, mountain floor”), Middle Low German denne, danne (“threshing-floor, small dale”), German Tenne (“threshing-floor, barn for threshing”).

From Old French denier, from Latin denarius.