say it: uh-NAWL-tur-uh-buhl
unalterable is an adjective meaning "not capable of being changed or altered". It carries 3 recorded senses.
not capable of being changed or altered
“unalterable resolve”
“an unalterable ground rule”
of a sentence; that cannot be changed
“an unalterable death sentence”
law
remaining the same for indefinitely long times
Definitions, synonyms and semantic relations for unalterable come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.