doubtless C2+ Topic:Mind & Cognition US /ˈdaʊtləs/ UK /ˈdaʊtləs/ See IPA manual Meanings 1 adv certainly or very probably; without doubt He will doubtless complain about the new policy. Thesaurus Synonyms 1 adv · certainly or very probably;... certainlyundoubtedlysurelyassuredlyunquestionablyindubitably ↔ Opposites doubtfullyuncertainlyquestionably Word family Derived forms doubtlesslydoubtlessness Related forms doubtdoubtful Etymology AI details From doubt + -less; doubt is from Old French douter, from Latin dubitare ('to waver, hesitate'), from dubius ('uncertain'). douter Old French dubitare Latin dubius Latin View etymology graph -> Topics Mind & Cognition Word Formation & Derivatives External links Cambridge Dictionary Wiktionary Google Images # doubtless **Type:** Word **Level:** C2+ **Part of speech:** adv **IPA (US):** /ˈdaʊtləs/ **IPA (UK):** /ˈdaʊtləs/ ## Meanings 1. certainly or very probably; without doubt ## Examples - He will doubtless complain about the new policy. ## Synonyms - certainly - undoubtedly - surely - assuredly - unquestionably - indubitably ## Antonyms - doubtfully - uncertainly - questionably ## Derived Forms - doubtlessly - doubtlessness ## Related Forms - doubt - doubtful ## Roots and Affixes - Root: douter - Root: dubitare - Root: dubius ## Etymology From doubt + -less; doubt is from Old French douter, from Latin dubitare ('to waver, hesitate'), from dubius ('uncertain'). ## AI Etymology Doubtless is from doubt + -less; doubt is from Old French douter, from Latin dubitare ('to waver, hesitate'), from dubius ('uncertain'). Important recorded forms include douter (Old French), dubitare (Latin), and dubius (Latin). Morphologically, the word is a built form whose named elements carry part of the historical sense. Its deeper history remains uncertain, with proposed links left as possibilities rather than a single settled derivation. The current sense covers certainly or very probably; without doubt. The wider family includes derived forms such as doubtlessly and doubtlessness and related words such as doubt and doubtful. ## Topics - Mind & Cognition - Word Formation & Derivatives markdown