undoubtlessly
Synonym of without a doubt.
Adverb
- Synonym of without a doubt.
- “Now, little girl,” he says, with a fatherly smile (he'll soon be twenty-six), “tell me just what your difficulty is, and undoubtlessly we'll fix it up in a jiffy!” - 1920, American Magazine, volume 90, page 70:
Synonyms: without a doubt
Origin
From un- + doubtlessly.