drop down

Từ điển WordNet v3.1 - WordNet Dictionary

verb

fall or descend to a lower place or level
- He sank to his knees
• Syn:
sink, drop
• Derivationally related forms:
drop (for: drop)
• Hypernyms:
change posture
• Hyponyms:
drop open, fall open, sag, droop, swag,
flag, sag down
• Verb Group:
slump, fall off, sink, drop
• Verb Frames:
- Something ----s
- Somebody ----s