FUSTY

adjective (fustier; -est) Etymology: probably alteration of Middle English foisted, foist musty, from foist wine cask, from Anglo-French fust, fuist wood, tree trunk, cask, from Medieval Latin fustis Date: 14th century impaired by age or dampness ; moldy , saturated with dust and stale odors ; musty , rigidly old-fashioned or reactionary, see: malodorous fustily adverb fustiness noun