indubious

adjective

in·​dubious

(ˈ)in,

ən+

archaic

: indubitable, certain

Word History

Etymology

perhaps from Latin indubius, from in- in- entry 1 + dubius dubious

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now