Undoubtedly: Definition, Examples, and Usage Guide

Meaning 1：without doubt (undoubtedly)

undoubtedly 🔊

/ʌnˈdaʊtɪdli/

adv.

In a way that is completely certain and leaves no room for any doubt.

Undoubtedly adverb example teacher proud student perfect score

without doubt 🔊

➕

/wɪˈðaʊt daʊt/

adv.

Used to emphasize that something is completely certain and cannot be questioned or disputed.

📁 Category：Language Evolution 🔖 Level：Intermediate

📘 Details & Usage

📖 Root Explanation

Prefix un- (not) + doubted (past participle of doubt, from Latin dubitare) + suffix -ly (adverb). Meaning: without any doubt.

💡 Mnemonic

Un-doubt-ed-ly: split into 'no doubt' + 'ly' → no doubt at all. Think of a judge hammering down a verdict: 'Undoubtedly guilty!'

📖 Example

The new social media platform is undoubtedly the most popular among teenagers this year. 🔊 This year, the new social media platform is certainly the most popular among teenagers, with no room for doubt.

🔗 Collocations

undoubtedly true – completely and certainly true

undoubtedly the best – indisputably the best

undoubtedly correct – absolutely correct without any error

🔄 Synonyms

certainly (adv.) – Used to emphasize that something is definitely true or will happen.

indubitably (adv.) – In a way that is impossible to doubt; unquestionably.

unquestionably (adv.) – In a way that cannot be disputed or doubted.

🚫 Antonyms

doubtfully (adv.) – In a way that expresses uncertainty or lack of conviction.

uncertainly (adv.) – In a way that is not known or definite; hesitantly.

questionably (adv.) – In a way that is open to doubt or suspicion.

🌱 Derivatives

undoubted (adj.) – Not doubted or questioned; certain.

doubtless (adv.) – Almost certainly; without doubt.

doubt (n./v.) – A feeling of uncertainty; to be uncertain about.

📖 Cultural Story

Originates from Middle English 'undoutedly', combining Old French 'douter' (to doubt) and Germanic affixes. Commonly used in legal and academic contexts to assert absolute certainty, e.g., 'The evidence is undoubtedly conclusive.'