This is the 8697th most frequent Polish word.
reca
"Ręca" is likely a misspelling or a regional variation of "ręka," which means "hand" in English.
In this sentence, 'ręką' (hand) refers to the action performed using the hand as an instrument.
Kiedy upadłem, złapałem się ręką za kolano.
When I fell, I grabbed my knee with my hand.
Here, 'rękę' (hand) is used metaphorically to signify help or support.
Podaj mi rękę, żebyśmy mogli iść razem.
Give me your hand so that we can go together.
This use of 'ręka' (hand) identifies the physical part of the body explicitly, emphasizing its attribute.