a force to be reckoned with

force to be reckoned with

A person or thing considered to be strong, powerful, or difficult to defeat. They say the young boxer is a force to be reckoned with, so I'm betting he'll win the match tonight. The attorney may look petite and meek, but she's a force to be reckoned with in the courtroom.
See also: force, reckon
Farlex Dictionary of Idioms.

a force to be ˈreckoned with

a person or thing that has a lot of power and influence and should therefore be treated seriously: The increased size of the country’s army means that it is now a force to be reckoned with. Be very careful how you deal with her because she’s a force to be reckoned with.
See also: force, reckon
Farlex Partner Idioms Dictionary
See also:
  • force to be reckoned with
  • be a force to be reckoned with
  • a force to reckon with
  • (someone or something) to be reckoned with
  • reckon
  • to be reckoned with
  • force
  • tomato can
  • up the ante
  • gamble on