Definition

Adverb: Without any doubt; certainly. Used to emphasize that something is definitely true or will definitely happen.

Usage

"Undoubtedly" is used to express complete certainty about a statement. It is a strong, formal adverb that strengthens the assertion of the main verb. It is typically placed before the adjective, adverb, or main verb it modifies, or at the beginning of a sentence for emphasis.

Examples

• The team has undoubtedly improved this season.
• She is undoubtedly one of the most talented artists of her generation.
• Undoubtedly, the discovery will change the course of future research.
• This is undoubtedly the best cake I have ever tasted.

Advanced Usage

• "Undoubtedly so": A formal and emphatic way to agree with a previous statement.
  • "Is he the best candidate for the job?" "Undoubtedly so."
• Used in concessive structures to acknowledge a fact before making a contrasting point.
  • Undoubtedly expensive, the car is nevertheless worth the investment for its safety features.

Variants and Related Words

• Undoubted (adjective): Not questioned or doubted; accepted as certain.
  • She is the undoubted leader of the project.
• Doubtless (adverb): Very probably. (Similar to "undoubtedly" but can sometimes imply slightly less absolute certainty in modern usage).
  • He will doubtless call us when he arrives.

Synonyms

• Certainly
• Definitely
• Unquestionably
• Indisputably
• Without a doubt

Antonyms

• Possibly
• Perhaps
• Maybe
• Doubtfully

Related Phrases and Idioms

• Beyond (a shadow of) a doubt: With absolute certainty (often used in legal contexts).
  • The evidence proved his guilt beyond a shadow of a doubt.
• Without a doubt: An adverbial phrase with the same meaning as "undoubtedly," but less formal.
  • She is, without a doubt, the fastest runner here.

Adverb

1. without doubt; certainly
   • it's undoubtedly very beautiful