undoubtedly

adverb

1. Without question: absolutely, certainly, doubtless, doubtlessly, positively. See certain/uncertain, limited/unlimited.
2. It is so; as you say or ask: absolutely, agreed, all right, assuredly, aye, gladly, indubitably, roger, unquestionably, willingly, yea, yes. Informal OK, uh-huh, yeah, yep. Slang right on. See affirm/deny/argue.

adv

Definition: certainly
Antonyms: doubtfully, indefinite, questionably

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IN BRIEF: Certainly.

For the human mind is seldom at stay: If you do not grow better, you will most undoubtedly grow worse. — Samuel Richardson (1689-1761).

Note: click on a word meaning below to see its connections and related words.

The adverb has one meaning:

Meaning #1: with certainty
  Synonyms: doubtless, beyond question, without doubt, beyond any doubt
  Derived from adjective: undoubted (meaning #1)

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Dansk (Danish)
adv. - utvivlsomt

Nederlands (Dutch)
ongetwijfeld

Français (French)
adv. - indubitablement, sans aucun doute

Deutsch (German)
adv. - zweifellos

Ελληνική (Greek)
adv. - αναμφισβήτητα, αναμφίβολα

Italiano (Italian)
indubbiamente

Português (Portuguese)
adv. - indubitavelmente

Русский (Russian)
несомненно

Español (Spanish)
adv. - indudablemente, sin duda

Svenska (Swedish)
adv. - otvivelaktigt, utan tvivel

中文（简体）(Chinese (Simplified))
无庸置疑地, 的确地

中文（繁體）(Chinese (Traditional))
adv. - 無庸置疑地, 的確地

한국어 (Korean)
adv. - 의심할 것도 없이, 분명히

日本語 (Japanese)
adv. - 疑いようもなく, 確かに

العربيه (Arabic)
‏(ظرف) بلا شك, يقينا, بلا ريب‏

עברית (Hebrew)
adv. - ‮ללא ספק, בוודאי‬

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