unremovable

Cannot be extracted

Unremovable describes something that cannot be taken away, detached, or eliminated.

A stain might be unremovable from fabric; a tumor might be unremovable without risking the patient's life.

The word often appears in contexts where removal has been attempted or considered: The graffiti proved unremovable despite our best efforts.

Irremovable means the same thing.

stubborn

obstinate

Firmly refusing to yield

persistentContinuing despite difficulty
tenaciousStubbornly determined to continue
unyieldingRefusing to give way

intractable · resistant · clingy · adhesive · sticky · stuck · lodged · wedged · jammed · impacted

permanent

irreversible

Cannot be undone

irrevocableCannot be undone
unalterableIncapable of being changed
unchangeableImpossible to modify

immutable · perpetual · eternal · everlasting · lasting · enduring · lifelong · timeless · indestructible · imperishable

fixed

anchored

Fixed securely in position

securedMade fast or obtained
fastenedJoined or held together
attachedJoined to another thing

bolted · nailed · riveted · clamped · bonded · cemented · welded · glued · moored · embedded

indelible

stain

Lasting surface discoloration

tattooPermanent dermal design
inkWriting fluid
scarPermanent mark from healing

mark · dye · blemish · birthmark · watermark · graffiti · branding · engraving · etching · imprint

Opposites

permanence/detachability

unremovableremovable

Capable of being detached

detachable · separable · extractable · dislodgeable · portable

flexibility/changeability

unremovablechangeable

Capable of alteration

alterable · modifiable · adjustable · reversible · replaceable

ease of displacement

unremovableremovable

Capable of being detached

easily removed · movable · portable · transferable · free

Family

remove, removed, removal, removing, removes, removable, remover, removers, irremovable

Familiarity: Top 500,000
Profile: Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G