The word "undoubtedly" is an adverb that means without doubt; certainly; definitely. It is used to express a strong level of confidence about a statement or situation, indicating that something is true and there should be no hesitation or uncertainty about it.
The word "undoubtedly" is formed from the prefix "un-" meaning "not," combined with "doubt," which originates from the Latin word "dubitare,” meaning "to doubt." The suffix "-ly" is added to form an adverb. This construction reflects the negation of doubt, suggesting absolute certainty.