This is the 12949th most frequent Polish word.
ocieplać
"To warm" or "to insulate."
Here, 'ocieplać' refers to the action of making something warmer, specifically improving thermal insulation.
W zimie ludzie starają się ocieplać swoje domy.
In winter, people try to insulate their homes.
In this sentence, 'ocieplać' is used figuratively to describe creating a more welcoming or comfortable environment.
Podczas rozmowy starał się ocieplać atmosferę, aby rozmówcy poczuli się bardziej komfortowo.
During the conversation, he tried to warm the atmosphere to make the interlocutors feel more comfortable.
Here, 'ocieplać' has a metaphorical meaning, referring to improving or softening strained relations.