Reckon

verb (used with object)
1.
to count, compute, or calculate, as in number or amount.
2.
to esteem or consider; regard as:
to be reckoned an authority in the field.
3.
Chiefly Midland and Southern U.S. to think or suppose.
verb (used without object)
4.
to count; make a computation or calculation.
5.
to settle accounts, as with a person (often followed by up).
6.
to count, depend, or rely, as in expectation (often followed by on).
7.
Chiefly Midland and Southern U.S. to think or suppose.
Verb phrases
8.
reckon with,

to include in consideration or planning; anticipate:
He hadn’t reckoned with so many obstacles.
to deal with:
I have to reckon with many problems every day.

verb
1.
to calculate or ascertain by calculating; compute
2.
(transitive) to include; count as part of a set or class: I reckon her with the angels
3.
(usually passive) to consider or regard: he is reckoned clever
4.
(when transitive, takes a clause as object) to think or suppose; be of the opinion: I reckon you don’t know where to go next
5.
(intransitive) foll by with. to settle accounts (with)
6.
(intransitive; foll by with or without) to take into account or fail to take into account: the bully reckoned without John’s big brother
7.
(intransitive; foll by on or upon) to rely or depend: I reckon on your support in this crisis
8.
(transitive) (slang) to regard as good: I don’t reckon your chances of success
9.
(transitive) (informal) to have a high opinion of: she was sensitive to bad reviews, even from people she did not reckon
10.
to be reckoned with, of considerable importance or influence
In addition to the idiom beginning with reckon