INALTERABLE
unalterable, inalterable
(adjective) not capable of being changed or altered; “unalterable resolve”; “an unalterable ground rule”
Source: WordNet® 3.1
Etymology
Adjective
inalterable (comparative more inalterable, superlative most inalterable)
That cannot be altered.
Synonyms
• unalterable
• unchangeable
Antonyms
• alterable
Source: Wiktionary
In*al"ter*a*ble, a. Etym: [Pref. in- not + alterable: cf. F.
inaltérable.]
Definition: Not alterable; incapable of being altered or changed;
unalterable.
– In*al"ter*a*ble*ness, n.
– In*al"ter*a*bly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition