Answer: perpetuities

AnswerCrossword Clue
perpetuitiesA restriction making an estate inalienable perpetually or for a period beyond certain limits fixed by law
perpetuitiesA thing that lasts forever or for an indefinite period, in particular
perpetuitiesA bond or other security with no fixed maturity date
perpetuitiesAn estate so restricted
perpetuitiesThe state or quality of lasting forever
perpetuitiesPERPETUITY, the state of being perpetual