accidental
/ˌæksəˈdɛntl̟/
adjective
Britannica Dictionary definition of ACCIDENTAL
:
happening in a way that is not planned or intended
:
happening by accident
:
happening as an accident
— accidentally
/ˌæksəˈdɛntl̟i/
adverb
-
He accidentally deleted the file.
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The lock prevents the gate from opening accidentally.
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Did it happen accidentally [=by accident] or intentionally?
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He bumped into her accidentally on purpose. [=he bumped into her on purpose but he tried to make it appear to be an accident]