wanton
Definition
Careless or reckless, especially in the infliction of cruelty or violence; showing deliberate ruthlessness.
हिन्दी क्रूरता या हिंसा के प्रति लापरवाह या बेफिक्र; जानबूझकर निर्दयता दिखाना।
Example
"The soldiers were punished for their wanton destruction of civilian property."