unknowingly
Word family
Synonym discussion
Sense: adverb/1
All four adverbs describe actions done without full awareness, but they differ in what kind of awareness is missing. Unknowingly focuses on a lack of knowledge or understanding — you do something without realising a key fact about the situation. Unconsciously refers to doing something automatically, without deliberate thought, often because of habit or instinct (e.g. 'she unconsciously bit her nails'). Inadvertently carries a stronger sense of carelessness or lack of attention — you meant no harm but were not paying close enough attention (e.g. 'he inadvertently deleted the file'). Unwittingly is the closest to unknowingly but tends to appear in more formal or legal contexts, often implying that someone was tricked or kept in the dark (e.g. 'the driver unwittingly carried stolen goods across the border'). In everyday speech, unknowingly is the most natural choice for describing an unintended result that came from simply not knowing something.
Etymology
Formed by adding the adverb suffix -ly to the present participle unknowing, which itself combines the Old English prefix un- (meaning 'not') with knowing (from the verb know, rooted in Old English cnāwan, meaning 'to recognise or understand'). The word has been in use since at least the 14th century.
First known use
14th century
14th century, in the meaning defined above Noun