This is the 4752nd most frequent Polish word.
obietnic
"Obietnic" is the genitive plural form of the Polish word "obietnica," which means "promises."
In this sentence, 'obietnic' is used in the genitive plural form to indicate the object of the verb 'nie złamałem' (I haven't broken).
Nie złamałem jeszcze żadnych obietnic.
I haven't broken any promises yet.
Here, 'obietnic' is in the genitive plural case, used after the noun 'składanie' (making), which implies the activity revolving around the subject word.
Składanie obietnic bez pokrycia jest niewłaściwe.
Making promises without keeping them is wrong.
'Obietnic' in this sentence is in the genitive plural case, following the adjective 'dane' (given), indicating what is given.