This is the 3054th most frequent Polish word.
podwójne
"Podwójne" means "double" in English.
In this sentence, 'podwójne' is used as an adjective modifying 'drzwi' (doors), indicating that there are two doors together, i.e., a pair.
Podwójne drzwi prowadziły do przestronnego salonu.
Double doors led to a spacious living room.
Here, 'podwójne' modifies 'shift' (shift), referring to working two consecutive shifts.
Muszę zrobić podwójne shift w pracy, bo mój kolega zachorował.
I have to do a double shift at work because my colleague got sick.
In this example, 'podwójne' describes 'znaczenie' (significance), indicating something has two meanings or aspects.