Answer: ruthless

AnswerCrossword Clue
RUTHLESSWithout compassion
RUTHLESSCutthroat
RUTHLESSCruel.
RUTHLESSInexorable.
RUTHLESSCruel
RUTHLESSWithout pity
RUTHLESSStopping at nothing
RUTHLESSUnfeeling
RUTHLESSWhat the 1920s Yankees didn't want to be?
RUTHLESSShowing no mercy
RUTHLESSBoston Red Sox after 1919?
RUTHLESSCold-blooded
ruthlesshaving no compassion
ruthlessHaving or showing no pity or compassion for others