1. On the job
   "had been at work for over an hour before her boss arrived"

See also: busy

• forte
• forte-piano
• fortemente
• forth
• Forth River
• forthcoming
• forthcomingness
• forthright
• forthrightly
• forthrightness
• forthwith
• forties
• fortieth
• fortification
• fortified
• fortified wine
• fortifier
• fortify
• fortis
• fortissimo
• fortitude
• fortnight
• fortnightly
• Fortran
• Fortran compiler