unprovoked

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

occurring without motivation or provocation
- motiveless malignity
- "unprovoked and dastardly attack"- F.D.Roosevelt
• Syn:
motiveless, wanton
• Similar to:
unmotivated
• Derivationally related forms:
wantonness (for: wanton)

• Từ đồng nghĩa / Synonyms:
  motiveless, wanton