This is the 12952nd most frequent Polish word.
oczekiwaniu
"Expecting" or "anticipation."
The word 'oczekiwaniu' is used here as a noun in the locative case to mean 'while waiting', typically as part of the expression 'w oczekiwaniu na' meaning 'in anticipation of' or 'waiting for'.
W oczekiwaniu na autobus czytałem książkę.
While waiting for the bus, I was reading a book.
Here, 'oczekiwaniu' is used as a noun referring abstractly to the 'anticipation' or 'expectation', indicating a context or state.
Oczekiwaniu na lepsze czasy towarzyszyła nadzieja.
The anticipation of better times was accompanied by hope.
In this usage, 'w oczekiwaniu' expresses 'in the process of waiting', referring to a prolonged or significant condition.