A common gender noun is one that can refer to either a male or a female person. Since a neighbor can be a man or a woman, it falls under this category.

১. Masculine gender refers only to males (e.g., brother).
২. Feminine gender refers only to females (e.g., sister).
৩. Neuter gender refers to non-living things (e.g., chair).

অতিরিক্ত তথ্য: Other common gender nouns include "student", "baby", and "doctor".