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reckon with (someone or something)
To prepare for, deal with, or take into account someone or something. The new president will have to reckon with the angry voices of all those who voted for him if he fails to deliver on his campaign promises. Not only do I have to pay for the car to be fixed, but I now have to reckon with a big increase in my car insurance premiums. The attorney may look petite and meek, but she's a force to be reckoned with in the courtroom.
reckon with someone or something
to deal with someone or something; to cope with someone or something. I have to reckon with the troublesome Mr. Johnson this afternoon. Mary knew just exactly how she had to reckon with the bill collector.
1. Take into account, be prepared for, as in The third-party movement is a force to be reckoned with during the primaries. This usage was first recorded in 1885.
2. Deal with, as in Your lost wallet isn't the only problem we have to reckon with. Also see take into account.
To take someone or something into account; deal with someone or something: The new governor will have to reckon with a large budget deficit. Now that this candidate has the support of the unions, she is definitely someone to be reckoned with.