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. 他的出色表現讓這部電影成爲了毋庸置疑的經典。

2. indubitablyADV

His behaviour was indubitably ill-judged. 他的行爲明顯是沒經過思考的。