Part of speech: Adjective
happening by chance or unexpectedly or unintentionally
Example: with an inadvertent gesture she swept the vase off the table; accidental poisoning; an accidental shooting
The word "accidental" comes from Late Latin accidēntālis. It started in Middle French accidentel. Then it appeared in Anglo-Norman accidentel. Later, people used it in Middle English accidental.
accident – A related word in the same word family.
-al – A related word in the same word family.
Words that pass through many languages often accumulate layers of meaning from each culture.