The gender of "king" is masculine.
According to the reference material, "King refers to masculine gender and queen refers to feminine gender." This clearly defines "king" as a word denoting a male individual. In the context of nouns, the gender signifies whether the noun is male, female, common (either male or female), or neuter (neither male nor female).
To further illustrate:
- Masculine: King, man, boy, male animal (e.g., rooster)
- Feminine: Queen, woman, girl, female animal (e.g., hen)
- Common: Parent, child, friend, teacher (can be male or female)
- Neuter: Table, chair, book (objects that are not alive and do not have a gender)
In summary, the term "king" unequivocally represents the masculine gender.