expression, godan verb (-su)
to be the mother of someone's child
A literary or euphemistic expression meaning to conceive and bear a child for a particular person. Often used in historical or dramatic contexts.
彼女は彼の種を宿した。
She bore his child.
物語では、姫が敵の種を宿す運命に
In the tale, the princess was fated to bear the child of her enemy.