1. Too old to be useful
   - overage, overaged, superannuated

See also: old

• fusilli
• fusion
• fusion bomb
• fusion cooking
• fusion reactor
• fuss
• fuss-budget
• fussily
• fussiness
• fusspot
• fussy
• fustian
• fustic
• fustigate
• fustigation
• fustily
• fusty
• futhark
• futhorc
• futhork
• futile
• futilely
• futility
• futon
• futtock