= causative action by which humans perform construction activities, either in order to erect a new building or to rebuild or repair an existing one
to build, to rebuild, to establish
Happen
literally: to build a house (for someone); hence: = action by which humans provide posterity for someone else
to establish a family line, to establish a dynasty
Birth
literally: to be built; hence: = action by which a slave woman gives birth to a child on behalf of her mistress, so that the continuity of the family line is ensured