accidental
Definition
Happening by chance, without being planned or intended.
日本語 偶然、計画や意図せずに起きたもの
Example
"The discovery was accidental, but it led to an important breakthrough."
Happening by chance, without being planned or intended.
日本語 偶然、計画や意図せずに起きたもの
"The discovery was accidental, but it led to an important breakthrough."