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UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈɒpʃənəl/US:USA pronunciation: respellingUSA pronunciation: respelling(op′shə nl)
optionalWordReference English Thesaurus © 2026Synonyms: elective, nonobligatory, noncompulsory, unforced, volitional, not required, according to one's will, voluntary Antonyms:
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