Definition of inadvertently adverb from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌɪnədˈvɜːtəntli//
; NAmE NAmE//ˌɪnədˈvɜːrtəntli//
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by accident; without intending to synonym unintentionally We had inadvertently left without paying the bill. Word Originmid 17th cent. (earlier (late Middle English) as inadvertence): from in- ‘not’ + Latin advertent- ‘turning the mind to’ (from the verb advertere) + -ly.
See the Oxford Advanced American Dictionary entry: inadvertently