1. subtle difficult to detect or grasp by the mind or analyze
  2. doubtless certainly; without question
  3. butt weld a butt joint that is welded
  4. doubled twice as great or many
  5. doublet a man's close-fitting jacket, worn during the Renaissance
  6. spot weld each of the welds made by welding at a separate point
  7. bobtailed having a short or shortened tail
  8. butt-weld a butt joint that is welded
  9. buttweld join by a butt weld
  10. subtlety the quality of being difficult to detect or analyze
  11. double date a date in which two couples participate
  12. double-dyed without qualification; used informally as intensifiers
  13. total heat (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
  14. double dye dye twice
  15. spot-weld each of the welds made by welding at a separate point
  16. doubtful fraught with uncertainty
  17. double talk deliberately unintelligible gibberish
  18. spotweld make circular welds
  19. double reed a pair of joined reeds that vibrate together to produce the sound in some woodwinds
  20. doubtfully in a doubtful manner