indubitable

1. ADJ You use indubitable to describe something when you want to emphasize that it is definite and cannot be doubted. 不容置疑的[正式]

His brilliance renders this film an indubitable classic. 他的出色表现让这部电影成为了毋庸置疑的经典。

2. indubitablyADV

His behaviour was indubitably ill-judged. 他的行为明显是没经过思考的。