This is the 2380th most frequent Polish word.
zapewnienia
"Assurances" or "guarantees."
Here, "zapewnienia" is used to express verbal promises or guarantees made regarding something, in this case, the quality of the product.
Zapewnienia klienta dotyczące jakości produktu były przekonywujące.
The client's assurances about the product's quality were convincing.
In this example, "zapewnienia" refers to commitments or statements made to convince others of a certain truth, used in the context of political statements.
Nie wszystkie zapewnienia polityków okazują się prawdziwe.
Not all of the politicians' assurances turn out to be true.
The term "zapewnienia" here refers to the reassurances or promises given, possibly by a weather forecast or someone else promising steady weather.