"Pee-leg-gosh", of Hebrew origin, a "purchased wife". She is supposed to be monogamous, but, her husband probably "permanently hired" her because his first wife could not have children. Or, his first wife may have hired her, in which case the children would belong to the first wife. Kind of like a surrogate mother, but, surrogate mother & wife.

When you eat dirt for the first time and leave your family to build a shack in the woods