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Webster 1913 Edition

Adj.

Not doubted; not called in question; indubitable; indisputable;

as,

undoubted

proof;

undoubted

hero

–

Un-doubt′ed-ly

adv.

Adj.

undout'ed. Not doubted; not called in question; indubitable; indisputable; as undoubted proof; undoubted truth.

undoubted ‎(comparative more undoubted, superlative most undoubted)

Without doubt; without question; certain.
His undoubted skill meant that he was in much demand.
- 2012 June 9, Owen Phillips, “Euro 2012: Netherlands 0-1 Denmark”, in BBC Sport:
  Netherlands, one of the pre-tournament favourites, combined their undoubted guile, creativity, pace and attacking quality with midfield grit and organisation.