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brass-knuckled

adjective
brass-knuck·​led

Definition of brass-knuckled 

: inclined to or exhibiting aggression, hostility, or combativeness Arnault's willingness to wage the sort of highly publicized, brass-knuckled takeover battle formerly anathema to European executives has a lot to do with the U.S. market. — Dana Thomas, et al., Newsweek, 5 Apr. 1999

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First Known Use of brass-knuckled

1905, in the meaning defined above

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The first known use of brass-knuckled was in 1905

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