non-optional
You have to
Non-optional describes something that cannot be skipped, declined, or left out—it's required.
The term appears in contexts where options normally exist but one element isn't among them: Attendance at the safety briefing is non-optional.
Often used for emphasis when someone might assume they have a choice: This meeting is non-optional, people.
Required by rule
- obligatoryRequired by rule
- requiredNeeded by rule
- enforcedMade to be followed
- bindingLegally or morally required
prescribed · dictated · imposed · regulated · stipulated · legislated · statutory · decreed
Utterly required, irreplaceable
- necessaryIndispensable, cannot omit
- vitalEssential or sustaining existence
- crucialOf supreme importance
- fundamentalForming the base
integral · core · critical · requisite · prerequisite · key · central · basic
Impossible to prevent
- inescapableImpossible to avoid
- certainFree from doubt
- unpreventableImpossible to stop ahead
- fatedDetermined by destiny
destined · predestined · predetermined · guaranteed · doomed · imminent · impending · irrevocable
mandatory
Required by rule
- obligatoryRequired by rule
- requiredNeeded by rule
- enforcedMade to be followed
binding · prescribed · dictated · imposed · regulated · stipulated · legislated · statutory · decreed · commanded
indispensable
Utterly required, irreplaceable
- necessaryIndispensable, cannot omit
- vitalEssential or sustaining existence
- crucialOf supreme importance
fundamental · integral · core · critical · requisite · prerequisite · key · central · basic · paramount
unavoidable
Impossible to prevent
- inescapableImpossible to avoid
- certainFree from doubt
- unpreventableImpossible to stop ahead
fated · destined · predestined · predetermined · guaranteed · doomed · imminent · impending · irrevocable · unalterable
non-optionaloptional
Not mandatory
voluntary · elective · discretionary · up to you · choosable
non-optionaloptional
Not mandatory
unnecessary · nonessential · inessential · dispensable · superfluous
non-optionalflexible
Able to bend freely
negotiable · adjustable · malleable · open · variable
optional, option, options, opts, opting, optionally, optionality