undoubtable
adjEtymology From Middle English undoutable, undoutabil, equivalent to un- + doubtable.
1
Rare Incapable of being doubted; undoubted; indubitable.
- Her undoubtable quality had a non-individual flavour, as if standing for her class.1904, John Galsworthy, chapter 20, in The Island Pharisees:
- Derived terms
- undoubtability, undoubtably