unrefinable

Resists all purification

Something unrefinable cannot be purified, improved, or made more elegant.

The term applies to materials that resist processing—unrefinable crude oil contaminated with heavy metals—or to ideas, behaviors, or people resistant to cultivation: His manners remained unrefinable despite years of finishing school.

pure

unadulterated

Completely unmixed, genuine

undiluted · neat · pristine · virgin · untreated · crude · natural · unblended · straight · unmixed

permanent

immutable

Incapable of being changed

permanent · indelible · eternal · enduring · lasting · invariable · constant · stable · steadfast · unchanging

irreducible

elementary

Of first principles

simple · constituent · monolithic · unbreakable · bedrock · foundational · base · minimal · bare · ultimate

intrinsic

inherent

Existing as essential part

core · integral · embedded · inborn · natural · basic · underlying · elemental · deep-rooted · constitutional

final

finished

Brought to an end

resolved · definitive · conclusive · done · terminal · closed · decided · determined · finalized · sealed

Opposites
capacity for refinement/purification

unrefinablerefinable

Able to be purified

purifiable · distillable · processable · filterable · extractable

quality/purity state

unrefinablerefined

Purified or cultured

purified · distilled · processed · pure · clarified

improvability/perfectibility

unrefinableperfectible

Able to reach flawlessness

improvable · polishable · cultivable · developable · malleable

Family

fine, refined, refine, finesse, unrefined, finery, affinity, refining, finer

Familiarity
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Used worldwide · Timeless · Rated G