This is the 4374th most frequent Polish word.
handlowa
"Handlowa" means "commercial" or "trade-related" in English.
The word 'handlowa' here is an adjective modifying 'książka' (book), indicating its purpose related to trade or commerce.
Książka handlowa została zaktualizowana.
The trade book has been updated.
The word 'handlowa' here is an adjective describing 'strategia' (strategy), indicating its application in the context of trade or commerce.
Strategia handlowa firmy została przedstawiona.
The company's trading strategy has been presented.
In this sentence, 'handlowe' is an adjective modifying 'centrum' (center), describing its function as related to trade and shopping activities.