laugh softly

Từ điển WordNet v3.1 - WordNet Dictionary

verb

laugh quietly or with restraint (Freq. 1)
• Syn:
chuckle, chortle
• Derivationally related forms:
chortle (for: chortle), chuckle (for: chuckle)
• Hypernyms:
laugh, express joy, express mirth
• Verb Frames:
- Somebody ----s