This is the 236th most frequent Polish word.
pomoc
"Pomoc" means "help" or "assistance" in English.
Here, 'pomocy' is used in the genitive singular case to indicate 'help' as something being needed.
Potrzebuję pomocy przy odrabianiu lekcji.
I need help with doing my homework.
In this sentence, 'pomoc' is in its nominative singular form and refers to the assistance provided in an activity.
Dziękuję za pomoc w przenoszeniu pudeł.
Thank you for the help with moving the boxes.
Here, 'pomoc' is used nominatively to denote the support provided by the speaker.