Definition of reckon with
1 : to consider or think about (something) when making plans <They hadn't reckoned with all the paperwork that went along with buying a new house.>
2 : to deal with (someone or something that can cause problems or trouble) <Anyone who tries to change the system will have to reckon with me.>
Word by Word Definitions
: estimate, compute
: to determine by reference to a fixed basis
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