accidentally
ak-si-DEN-tuh-lee/ˌæk.sɪˈdɛnt(ə)li/
- 1Without intending to, as the result of a mistake rather than deliberate action.
The witness accidentally revealed the suspect's location during questioning.
Workers accidentally cut the main cable, knocking out power for hours.
Similarinadvertently, unintentionally, mistakenly, unwittingly
Oppositedeliberately, intentionally, purposely, knowingly
- 2By chance or unexpectedly, not as a result of any plan.
The two researchers accidentally arrived at the same conclusion independently.
She accidentally stumbled upon the hidden trail during her afternoon walk.
Similarfortuitously, casually
Oppositedeliberately, intentionally, purposely
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Origin
Formed from "accidental" combined with the suffix "-ly".