This is the 6242nd most frequent Polish word.
benjamin
In Polish, "benjamin" refers to the youngest child in a family.
In this sentence, "Benjamin" is used as a proper noun, referring to a person's name.
Benjamin jest moim najlepszym przyjacielem.
Benjamin is my best friend.
Here, "Benjamin" metaphorically refers to someone who is the youngest or considered the 'preferred' member, inspired by the biblical story of Benjamin.
W rodzinie, najmłodszy brat często jest Benjaminem.
In a family, the youngest brother is often the Benjamin.
In this case, "Benjamin" is used to name a type of plant, specifically the Ficus benjamina.