"Undoubtedly" is an adverb that means without a doubt, unquestionably, or certainly. It is used to express a high degree of certainty about something. The term is used to emphasize that something is true, very likely, almost certain, genuine, and undisputed.

For example, if you say a violinist's performance at a competition was undoubtedly the best of her career, that means you are certain that that was his or her best performance.

"Undoubtedly" is not to be confused with incorrect variants like "undoubtfully" and "undoubtably." Although the latter two sound like they could be correct, they are misspellings of "undoubtedly."

Example sentences

  1. The team's hard work and dedication undoubtedly contributed to their success.
  2. His expertise in the field was undoubtedly the reason he was chosen as the keynote speaker.
  3. The breathtaking view from the mountaintop was undoubtedly worth the strenuous hike.
  4. Her talent as a singer was undoubtedly recognized by a standing ovation from the audience.
  5. The research findings undoubtedly shed new light on the topic.
  6. The newlywed couple's love for each other was undoubtedly evident in their smiles and affectionate gestures.
  7. The historic monument is undoubtedly one of the city's most cherished landmarks.
  8. The innovative technology undoubtedly revolutionized the industry.
  9. The sudden downpour undoubtedly caught us off guard during our picnic.
  10. His charisma and charm undoubtedly made him a popular figure among his peers.

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Reference:

undoubtedly
1. used to emphasize that something is true: 2. used to emphasize that…
Definition of UNDOUBTED
not doubted : genuine, undisputed… See the full definition