UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌʌnɪnˈtɛnʃənəl/

US:USA pronuncation: IPAUSA pronuncation: IPA/ˌʌnɪnˈtɛnʃənəl/

US:USA pronunciation: respellingUSA pronunciation: respelling(un′in tenshə nl)

WordReference Random House Learner's Dictionary of American English © 2020
un•in•ten•tion•al /ˌʌnɪnˈtɛnʃənəl/USA pronunciation   adj. 
  1. not intentional or deliberate;
    unplanned:an unintentional insult.

WordReference Random House Unabridged Dictionary of American English © 2020
un•in•ten•tion•al  (un′in tenshə nl),USA pronunciation adj. 
  1. not intentional or deliberate:an unintentional omission from the list.
un′in•tention•al•ly, adv. 
  • un-1 + intentional 1775–85
    accidental, unplanned, inadvertent.

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