Cut off, to be
In Daniel 9:26, this signifies that divine truth shall be taken from the people, but will live again in a new church. (Apocalypse Explained 315[23])
In Genesis 17:14, this signifies eternal death. (Arcana Coelestia 2058)
In Exodus 23:23, this signifies that hell is removed solely through the protection of heaven by the Lord. (Arcana Coelestia 9316) To be cut off, as in Genesis 41:36, signifies to perish.
(References: Arcana Coelestia 5302, Genesis 41)
Mother
In general, mothers in the Bible represent the Lord's church on earth. In some cases "mother" more specifically refers to the truth of the church, the true teachings the church has about the Lord and about life. This makes sense if you think about it. Mothers are the vehicles through which new people are created; the church (in a broad sense) is the vehicle through which new ideas about the Lord and new good actions are created. And just as a mother is filled with love -- for her children and husband -- so also is the church filled with love, both for its ideas and uses and also for the Lord.