1. Having colour that is resistant to fading or running
   - colorfast [US]

See also: imperviable, impervious

• flexibleness
• flexibly
• flexile
• flexion
• flexitime
• flexor
• flexor muscle
• flextime
• flexuous
• flexure
• flibbertigibbet
• flick
• flick-knife
• flicker
• flickering
• flickertail
• flier
• flies
• flight
• flight attendant
• flight control
• flight deck
• flight engineer
• flight feather
• flight indicator