adv · 2 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
US:/ʌnˈɑl.təɹ.əbli/
US:Recorded audio is listed in the source snapshot.
CMU ARPABET:AH0 N AO1 L T ER0 AH0 B L IY0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adv
Meaning 1
In an unalterable manner; in a manner that makes it impossible to be altered.
Definition source: English Wiktionary via Wiktextract
Examples
First experiences are always the most memorable because they fix themselves in the mind unalterably and most powerfully.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
adverb
Meaning 2
in an unalterable and unchangeable manner
Definition source: Princeton WordNet 3.0
Examples
his views were unchangeably fixed
Meaning relationships
Synonyms: unchangeably, unassailably, immutably
Antonyms: none provided
History
Etymology
Etymology tree English unalterable Middle English -ly English -ly English unalterably From unalterable + -ly.