fall down

Từ điển WordNet v3.1 - WordNet Dictionary

verb

lose an upright position suddenly
- The vase fell over and the water spilled onto the table
- Her hair fell across her forehead
• Syn:
fall
• Derivationally related forms:
fall (for: fall)
• Hypernyms:
change posture
• Verb Group:
fall
• Verb Frames:
- Somebody ----s