This is the 14836th most frequent Polish word.
regatach
"Regatach" is the locative plural form of "regaty," meaning "regattas" (sailing races).
In this sentence, 'regatach' is used to indicate the event of boat racing.
W regatach udział wzięło ponad dwadzieścia jachtów.
Over twenty yachts participated in the regatta.
Here, 'regatach' refers to the regatta as a context.
Pamiętam atmosferę podczas regat w Sopocie.
I remember the atmosphere during the regatta in Sopot.
Usage of 'regatach' in this sentence specifies the occasion of the regatta where the performance took place.