unalterable

(ŭn-ôlˈtər-ə-bəl)

adjective
Impossible to alter: the unalterable season of bitter cold in Siberia.

Related Forms:

  • un·alˌter·a·bilˈi·ty, un·alˈter·a·ble·ness noun
  • un·alˈter·a·bly adverb

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