Mandatory

//ˈmæn.dəˌt(ɔ)ɹi//

Antonyms for "mandatory" (18 found)

Adjective(17 words)

discretionary elective facultative free noncompulsory nonessential nonmandatory nonobligate nonobligatory nonrequired nonrequisite optional optionary unnecessary unrequired volitional voluntary

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.