English

Adjective

undoubtable ‎(not comparable)

1. (rare) Incapable of being doubted; indubitable.
   • 1904, John Galsworthy, The Island Pharisees, ch. 20,

     Her undoubtable quality had a non-individual flavour, as if standing for her class.

Derived terms

• undoubtably

References

• undoubtable in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
• “undoubtable” in Dictionary.com Unabridged, v1.0.1, Lexico Publishing Group, 2006.
• Oxford English Dictionary, 2nd ed., 1989.