Ruthlessness(noun)
Meaning: the quality of lacking pity or compassion for others.
Hindi meaning:निष्ठुरता
Synonyms: Pitilessness, Savagery, Ferocity, Callousness
Antonyms: Mercy, Humanity, Grace, Benevolence
Example: The revolt was suppressed with total ruthlessness.
Trick to remember: ruthe hue log bade ruthless ho jate h 
