ruthless: cutthroat competition.
pertaining to a game, as of cards, in which each of three or more persons acts and scores as an individual.
Origin of cutthroat
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for cut throatsexecutioner, hunter, butcher, slayer, soldier, assassin, exterminator, cut-throat
Online Etymology Dictionary, © 2010 Douglas Harper