Having no compassion or pity; merciless: ruthless cruelty; ruthless opportunism. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "ruthless" in a sentence
"Over Microsoft's formative years when they redefined the term ruthless, my friends and I worked for several startup and small companies that were crushed by Microsoft which they then bought for pennies on the dollar."
"David Petraeus, the coalition's commander in Afghanistan, issued a rare apology Wednesday for a helicopter strike that killed nine children, hours after Afghan President Hamid Karzai condemned the allies for launching what he called a "ruthless attack.""
"President Hamid Karzai swiftly condemned what he described as a "ruthless act of terror to target innocent people who had gathered for a religious ceremony," saying the bombing exposed the "vile and vicious nature of the enemy who do not want to see the Muslim people of Afghanistan to perform even their Islamic rituals.""