1. Very tired
   - knackered [Brit], drained [Brit], zonked out [Brit], shagged [Brit], zonked [Brit], stonkered [Brit, Austral, NZ], shattered [Brit]

See also: tired

• filo
• filose
• Filoviridae
• filovirus
• fils
• filter
• filter bed
• filter coffee
• filter out
• filter paper
• filter tip
• filter-tipped
• filter-tipped cigarette
• filth
• filthily
• filthiness
• filthy
• filthy lucre
• filtrate
• filtration
• filtration surgery
• filum
• fimbria
• fimbriate
• fimbriated