fus ‧ ty /ˈfʌsti/ BrE AmE adjective
[ Date: 1400-1500 ; Origin: fust 'wooden wine container' (15-16 centuries) , from Old French , from Latin fustis ; ⇨ ↑ fustian ]
1 . if rooms, clothes, buildings etc are fusty, they have an unpleasant smell, because they have not been used for a long time SYN musty
2 . informal ideas or people that are fusty are old-fashioned:
fusty old academics
—fustiness noun [uncountable]