This is the 8097th most frequent Polish word.
noszenie
The act of carrying or wearing.
Here 'noszenie' is used as a gerund, which is the noun form of the verb 'nosić', meaning 'to carry'. It describes the activity of carrying objects and is used as the subject of the sentence.
Noszenie ciężkich przedmiotów jest męczące.
Carrying heavy objects is tiring.
In this sentence, 'noszenie' again refers to the act of carrying, specifically the act of wearing or supporting a backpack. It's used as part of the object of the preposition 'z' in Polish.
Mam problem z noszeniem plecaka przez długi czas.
I have trouble carrying a backpack for a long time.
Here, 'noszenie' means wearing, in the context of clothing. It shows how the same verb form can denote different specific actions, based on context.