This is the 2178th most frequent Polish word.
prawdopodobne
"Likely" or "probable."
In this instance, 'prawdopodobne' is used to express a possibility in the context of a question.
Czy to prawdopodobne, że wygramy tę grę?
Is it likely that we will win this game?
The word 'prawdopodobne' is used as an adjective describing a likelihood related to an event happening.
Jest prawdopodobne, że jutro będzie padać.
It is likely that it will rain tomorrow.
Here, 'prawdopodobne' serves as an adjective qualifying 'powody' (reasons).