/ ˌʌnɪnˈtenʃənl; NAmE / adjective
not done deliberately, but happening by accident :
Perhaps I misled you, but it was quite unintentional (= I did not mean to) .
OPP intentional
► un·in·ten·tion·al·ly / -ʃənəli; NAmE / adverb :
They had unintentionally provided wrong information.