rapid

Từ điển WordNet v3.1 - WordNet Dictionary

I - noun

a part of a river where the current is very fast
• Hypernyms:
waterway
• Part Holonyms:
river

II - adjective

1. done or occurring in a brief period of time (Freq. 21)
- a rapid rise through the ranks
• Similar to:
fast
• Derivationally related forms:
rapidness, rapidity
2. characterized by speed;
moving with or capable of moving with high speed
- a rapid movement
- a speedy car
- a speedy errand boy
• Syn:
speedy
• Similar to:
fast
• Derivationally related forms:
speediness (for: speedy), speed (for: speedy), rapidness, rapidity