This is the 1953rd most frequent Polish word.
całkowitej
"Całkowitej" means "total" or "complete" in English.
Here, 'całkowitej' is used as an adjective in the genitive case, describing the extent of the decision as complete.
To była kwestia całkowitej decyzji.
It was a matter of complete decision.
In this sentence, 'całkowitej' qualifies the noun 'ignorancji', indicating the absolute nature of the ignorance.
Nie przewidziałem całkowitej ignorancji tematu.
I did not foresee total ignorance of the topic.
Here, 'całkowitej' describes the necessity for agreement as being thorough and inclusive of everyone involved.