drone on

Từ điển WordNet v3.1 - WordNet Dictionary

verb

talk in a monotonous voice
• Syn:
drone
• Derivationally related forms:
drone (for: drone), droning (for: drone)
• Hypernyms:
talk, speak, utter, mouth, verbalize, verbalise
• Verb Frames:
- Somebody ----s
- Sam and Sue drone on