drab Look up drab at Dictionary.com
1686, "color of natural, undyed cloth," from M.Fr. drap (see drape). Figurative sense is c.1880. Apparently not related to earlier word meaning "a dirty, untidy woman" (c.1515), "a prostitute" (c.1530), which seems to be connected with Ir. drabog, Gael. drabag "dirty woman," and perhaps with Low Ger. drabbe "dirt."