This is the 2529th most frequent Polish word.
obie
"Obie" means "both" (feminine form).
The word 'obie' here is used as a numeral pronoun modifying a feminine plural noun 'książki', denoting two specific items.
Kupiliśmy obie książki, które nam polecono.
We bought both books that were recommended to us.
The word 'obie' here is used as a numeral pronoun referring to two feminine entities 'strony' in the nominative case.
Obie strony zgodziły się na warunki umowy.
Both parties agreed to the terms of the contract.
The word 'obie' here is used as a pronoun referring to two feminine entities (sisters) in the nominative case.