In′dis‐pen″sa‐ble (?), a. [Pref. in- not + dispensable: cf. F. indispensable.]
1. Not dispensable; impossible to be omitted, remitted, or spared; absolutely necessary or requisite.
2. (Eccl.) Not admitting dispensation; not subject to release or exemption.
The law was moral and indispensable. Bp. Burnet.
3. Unavoidable; inevitable. Fuller.