What is the meaning of ruthless?

adjective

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APAWordNet. (2010). ruthless. Retrieved October 17, 2018, from http://smartdefine.org/ruthless/definitions/1182665
ChicagoWordNet. 2010. "ruthless" http://smartdefine.org/ruthless/definitions/1182665 (accessed October 17, 2018).
HarvardWordNet 2010, ruthless, Smart Define, viewed 17 October, 2018, <http://smartdefine.org/ruthless/definitions/1182665>.
MLAWordNet. "ruthless" 23 October 2010. Web. 17 October 2018. <http://smartdefine.org/ruthless/definitions/1182665>
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