This is the 5704th most frequent Polish word.
wydawał
"Wydawał" means "he/she/it was giving out" or "he/she/it seemed" depending on context.
Here, "wydawał" is used in the context of publishing, indicating the action of producing and distributing books.
On wydawał książki przez wiele lat.
He published books for many years.
In this sentence, "wydawał" expresses an impression or appearance, reflecting the subject's perceived state.
Wydawał się być bardzo zmęczony.
He seemed to be very tired.
The usage of "wydawał" here refers to spending resources, specifically money, on a purpose.