因いん果がの胤たねを宿やどす

expression, godan verb (-su)

become pregnant with an illegitimate child

A fixed, somewhat old-fashioned expression literally meaning 'to harbor the seed of karma'. It refers specifically to becoming pregnant out of wedlock, often with a nuance of moral judgment or unfortunate circumstances.

• 昔むかしの小しょう説せつでは、因いん果がの胤たねを宿やどした娘むすめがよく登とう場じょうする。

  In old novels, a girl who has become pregnant with an illegitimate child often appears.