This is the 12958th most frequent Polish word.
oczywisty
Obvious.
Oczywisty here is used in its standard adjectival form to describe something clear or evident.
To jest oczywiste, że musimy tam pojechać.
It is obvious that we have to go there.
Oczywisty is used in its instrumental form 'oczywistą' to characterize a specific attribute of truth.
Oczywistą prawdą jest to, że każdy potrzebuje miłości.
An evident truth is that everyone needs love.
Here 'oczywisty' is modified into the adverb 'oczywiście' to describe an action being performed in an evident manner.