This is the 1462nd most frequent Polish word.
arka
"Arka" in Polish means "ark" (a large boat or vessel, often referring to Noah's Ark).
Here, 'arka' refers to a large boat, specifically the biblical Ark of Noah.
Noe zbudował arkę, aby uratować ludzi i zwierzęta.
Noah built an ark to save people and animals.
In this instance, 'arka' is used metaphorically to describe a structure similar to a large ship.
Obiekt przypominał ogromną arkę, unoszącą się na wodzie.
The structure resembled a huge ark floating on water.
Here, 'arka' denotes a symbolic structure or vessel representing an idea or concept, such as unity.