unrestrainable

Impossible to check

Unable to be held back or kept in check.

Unrestrainable describes forces, impulses, or entities that resist all attempts at control: an unrestrainable urge to laugh, unrestrainable enthusiasm.

The word emphasizes that restraint has been tried or considered and found impossible, distinguishing it from merely unrestrained, which may simply mean no restraint was applied.

wild

untamed

Not domesticated

unchecked · uncontrolled · ungovernable · unmanageable · undisciplined · lawless · anarchic · chaotic · rampant · runaway

fierce

ferocious

Extremely violent or aggressive

turbulent · tempestuous · volatile · violent · furious · intense · blazing · fiery · eruptive · uncontainable

indomitable

unconquerable

Impossible to defeat

undefeatable · insurmountable · unquenchable · irrepressible · undaunted · relentless · inexorable · indefatigable · persevering · unflagging

defiant

unyielding

Refusing to give way

willful · intractable · incorrigible · uncooperative · recalcitrant · rebellious · mutinous · disobedient · unruly · wayward

Opposites
controllability

unrestrainablerestrainable

Able to be controlled

controllable · containable · manageable · suppressible · checkable

tameness/wildness

unrestrainabletameable

Able to be subdued

tame · docile · manageable · tractable · domesticated

Family

restrain, restraint, restriction, constraint, restrained, restraining, unrestrained, restrictive, restricting

Familiarity
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Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G