adjective
Definition: Describing someone or something that is very cruel, ruthless, or merciless, especially in competition or business.
Example: The cutthroat competition in the market forced many small businesses to close.
noun
Definition: A person who is ruthless and willing to do anything to succeed, often at the expense of others.
Example: In the business world, being a cutthroat can sometimes lead to success, but it can also damage relationships.