The state or quality of being immutable; immutableness.
The state of being unchangeable in the memory after creation.
The quality or state of being perpetual; endless duration; uninterrupted existence.
An annuity in which the periodic payments begin on a fixed date and continue indefinitely.
Something that is perpetual.
A limitation intended to be unalterable and of indefinite duration; a disposition of property which attempts to make it inalienable beyond certain limits fixed or conceived as being fixed by the general law.