All required antonyms
re·quire
R r adjective required
- noncompulsory — Not compulsory.
- exempt — Free from an obligation or liability imposed on others.
- exempted — Simple past tense and past participle of exempt.
- elective — Related to or working by means of election.
- nonobligatory — Not obligatory; not required; optional.
- optional — left to one's choice; not required or mandatory: Formal dress is optional.
- excused — Simple past tense and past participle of excuse.
adj required
- discretional — discretionary.
- causeless — a person or thing that acts, happens, or exists in such a way that some specific thing happens as a result; the producer of an effect: You have been the cause of much anxiety. What was the cause of the accident?