Definitions

1. verb

to make or declare something certain or free from doubt

“The judge’s verdict indubitated the innocence of the accused.”

2. verb (archaic)

to make or declare something certain or beyond doubt

“In the medieval period, the clergy’s declaration indubitated the divine origin of the scriptures.”

3. noun

a thing that is certain or beyond doubt

“The scientist’s discovery was hailed as an indubitate proof of the existence of dark matter.”