1An adverb used to express a likely prediction without full certainty; often used when anticipating a negative outcome.
恐らく彼はもう出発しただろう。
He has probably already left.
この天気だと、恐らく試合は中止になる。
Given this weather, the game will probably be canceled.
恐らく彼女は知らないと思う。
I suspect she doesn't know.
恐らく、その話は誤解から生まれたのだろう。
That story probably arose from a misunderstanding.