three-quarter-sibling

1- First cousin and half-sibling at the same time.
2- Child of mother and of uncle (father's brother) at the same time.
3- Child of father and of aunt (mother's sister) at the same time.

Three-quarter-sibling.

by Jazigurn October 28, 2024

sibling-in-law

1. The spouse of one's sibling.
2. The sibling of one's spouse.

My sibling-in-law is a good person.

by Elivaldeq November 24, 2019

Younger Sibling Syndrome

When a younger sibling constantly feels inferior to their older sibling.

there always compared to their sibling, it’s a clear case of Younger Sibling Syndrome

by Imhotandurnot November 14, 2022