This is the 5909th most frequent Turkish word.
tesadüf
Coincidence.
Here, 'tesadüfen' is an adverb meaning 'coincidentally' and describes an action done by chance.
Tesadüfen aynı otobüse bindik.
We coincidentally boarded the same bus.
The word 'tesadüf' is used as a noun meaning 'coincidence.' It refers to an unexpected occurrence.
Bu şehirde karşılaşmamız büyük bir tesadüf.
It was a great coincidence that we met in this city.
Here, 'tesadüf' denotes a situation that is often considered random or by chance.