fustiest
fus-ti-est
adjective
Having the most unpleasantly stale, damp, or old-fashioned smell or character.
"The fustiest old books filled the dusty library."
Thesaurus
Synonyms: fusty, nonprogressive, standpat, unprogressive, conservative, malodorous, ill-smelling, stinky, musty, frowsty, unpleasant-smelling, malodourous