1. first water the highest quality gems
  2. first-rater one who is first-rate
  3. first-rate of the highest quality
  4. first-nighter someone habitually a spectator at the openings of theatrical productions
  5. wastewater water mixed with waste matter
  6. first quarter the first fourth of the Moon's period of revolution around the Earth
  7. first gear the lowest forward gear ratio in the gear box of a motor vehicle; used to start a car moving
  8. first team a team representing a college or university
  9. first-year used of a person in the first year of an experience
  10. first aid emergency care given before regular medical aid can be obtained
  11. frustrate hinder or prevent, as an effort, plan, or desire
  12. first degree a degree of one
  13. first sacker (baseball) the person who plays first base
  14. first mate the officer below the master on a commercial ship
  15. firewater any strong spirits (such as strong whisky or rum)
  16. First State a Mid-Atlantic state; one of the original 13 colonies
  17. first step the first of a series of actions
  18. farsighted able to see distant objects clearly
  19. frost over become covered with a layer of ice
  20. frost-weed perennial of the eastern United States having early solitary yellow flowers followed by late petalless flowers; so-called because ice crystals form on it during first frosts

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