This is the 11631st most frequent Polish word.
klatę
"Chest" (colloquial form).
Here, "klatę" refers to the chest area, used informally to describe the pectoral muscles.
Podnosił ciężary, aby wzmocnić swoją klatę.
He lifted weights to strengthen his chest.
In this sentence, "klatę" again refers to the chest but in the context of holding someone physically.
Przytrzymał go za klatę, aby go uspokoić.
He held him by the chest to calm him down.
Here, "klatę" is used figuratively, indicating taking responsibility wholeheartedly, as if carrying it on one's chest.