sib

Having kinship or relationship; related by same-bloodedness; kindred.

[…] they are sibber to you than ever Miss Innes was or will be; and if like to bid me, […]

seeing that his Majesty is "sibber to him than all the brothers and sons he has in the world." So far, James Haig had played his part with consummate skill.

Akin (to); similar (to).

[…] we are so much the sibber to Christ that we suffer; […]

1701. June 19. Dewar of Lassody against Scott of Spencerfield's Factor and Creditors. […]; and that creditors seemed to be much sibber to these annualrents than the factors.

Kindred; kin; kinsmen; a body of persons related by blood in any degree.

A kinsman; a blood relation; a relative, near or remote; one closely allied to another; an intimate companion.

But she got up to go, and Domenico obeyed me too in mock meekness, making himself sib and coeval to Hortense, submissive to frowning elder brother, something incestuous in it.

A sibling, brother or sister (irrespective of gender)

Any group of animals or plants sharing a corresponding genetic relation

A group of individuals unilaterally descended from a single (real or postulated) common ancestor

To bring into relation; establish a relationship between; make friendly; reconcile.