younger

Refers to a male sibling who is of a lesser age.

Refers to a female sibling who is of a lesser age.

Refers to the group of people who are currently young.

Refers to a female child who is of a lesser age relative to another sibling.

Refers to a male child who is of a lesser age relative to another sibling.

Refers to a brother or sister who is of a lesser age.

Refers to the twin who was born second.

Refers to oneself at an earlier time in life.

Refers to a person or thing holding a corresponding role but who is younger.

Refers to a student, especially in a school, who is of a lesser age.