This is the 2418th most frequent Polish word.
świadectwa
"Świadectwa" means "certificates" or "testimonies" in English, depending on context.
Here, 'świadectwa' refers to documents proving completion of educational courses.
Posiadam świadectwa ukończenia różnych kursów.
I have certificates of completion for various courses.
In this context, 'świadectwa' denotes evidence or traces of historical events.
Archeolodzy znaleźli świadectwa życia sprzed tysięcy lat.
Archaeologists found evidence of life from thousands of years ago.
Here, 'świadectwa' (in singular form 'świadectwem') is used figuratively to mean a testament or proof of a certain quality.