unintentionally

US /ˌʌn.ɪnˈten.ʃən.əl.i/
UK /ˌʌn.ɪnˈten.ʃən.əl.i/
1.

vô tình

in a way that is not intentional:

:
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I was either intentionally or unintentionally excluded from a lot of the decisions that were made.