快慢

kuàimàn
speed

CEDICT

fast and slow; speed

Wiktionary

Entry Composition

1 快 kuài
  1. rapid
  2. quick
  3. speed
  4. rate
  5. soon
  6. almost
  7. to make haste
  8. clever
  9. sharp (of knives or wits)
  10. forthright
  11. plainspoken
  12. gratified
  13. pleased
  14. pleasant
2 慢 màn slow

Related entries

航速 hángsù speed (of ship or plane)
速度 sùdù
  1. speed
  2. rate
  3. velocity
  4. (music) tempo

classifier: 個

速度提升。

Faster.

Source: Tatoeba

快 kuài
  1. rapid
  2. quick
  3. speed
  4. rate
  5. soon
  6. almost
  7. to make haste
  8. clever
  9. sharp (of knives or wits)
  10. forthright
  11. plainspoken
  12. gratified
  13. pleased
  14. pleasant
快想！

Think quickly!

Source: Tatoeba