mid-15c., from Latin indubitabilis "that cannot be doubted," from in- "not, opposite of" (see in- (1)) + dubitabilis "doubtful," from dubitare "hesitate, doubt" (see doubt).
例文
1. The indubtable evidence we produced bore down our opponents in the debate.
私たちが議論の中で提出した疑いの余地のない証拠は、相手を打ち負かした。
2.His brilliance renders this film an indubtable classic.
彼の素晴らしい演技はこの映画を疑う余地のない古典にした。/
3.It is indubtable that at the arrival of each fresh Fosyte child he was quite upset.