mold·er (US) or Brit mould·er 
/ˈmoʊldɚ/ verb
mold·ers; mold·ered; mold·er·ing /ˈmoʊldɚ/ verb [no obj] : to rot slowly especially from not being used : to decay slowly
▪ An entire shipment of fruit is moldering (away) in the warehouse because of the strike. ▪ moldering [=decaying] old books
▪ An entire shipment of fruit is moldering (away) in the warehouse because of the strike. ▪ moldering [=decaying] old books
