The leader of the party is ruthless, and will do anything to stay in power.
The demonstration was ruthlessly put down by government security forces.
The government ruthlessly suppresses the opposition through murder, torture and intimidation.
The Mafia boss had a reputation
for ruthlessness that terrified everyone around him.
He is a ruthless businessman who has climbed to the top on the backs of those around him.
He is generally a really calm, quiet guy, but when he plays tennis, he is totally ruthless, and determined to win.
Chinese soldier
Feng Lei was quoted as saying, "To the class enemy, I am cruel and ruthless like harsh winter."
The corporation has been ruthless in putting down all attempts at unionization by its workers.
The terrorists who attacked the city of New York on September 11th, 2001, were ruthless
killers.
The triumphant army ruthlessly massacred any soldiers who surrendered.
The nomads of Somalia share a way of life that is governed by the ruthless Somali desert.
Joseph Stalin was a cruel, ruthless leader responsible for the imprisonment or death of millions of Russians.
Genghis Khan was known as a ruthless warrior, and a brilliant military strategist.
Many of those who resisted the communist dictatorship in Czechoslovakia were ruthlessly eliminated by execution, torture and starvation in labor camps.
The Gestapo was notorious throughout Europe for its ruthless efficiency.