unthinkable

Too awful fathoming

Unthinkable describes something too extreme or horrifying to consider seriously: The idea of abandoning her children was unthinkable.

It often marks moral boundaries—acts so terrible they shouldn't enter consideration.

The word can also mean simply inconceivable or impossible to imagine: A world without smartphones was unthinkable to them.

impossible

inconceivable

Beyond mental grasp

implausible · improbable · unfeasible · unattainable · insurmountable · unrealizable · mind-boggling · undreamed-of · unprecedented · unheard-of

shocking

jaw-dropping

Extremely surprising or impressive

stupefying · flabbergasting · mind-blowing · earth-shattering · bombshell · blindsiding · startling · unbelievable · sensational · extraordinary

taboo

forbidden

Not allowed

blasphemous · heretical · unspeakable · verboten · anathema · stigmatized · transgressive · indecent · shameful · scandalous

horrific

atrocious

Appallingly, shockingly wicked

unspeakable · unconscionable · unforgivable · inexcusable · reprehensible · appalling · ghastly · gruesome · diabolical · fiendish

radical

revolutionary

Seeking fundamental systemic change

groundbreaking · transgressive · unconventional · unorthodox · disruptive · avant-garde · taboo-breaking · boundary-pushing

Categories
Opposites
conceivability

unthinkablethinkable

Able to be considered

conceivable · imaginable · fathomable · ponderable · comprehensible

acceptability/moral consideration

unthinkableacceptable

Meeting minimum standards

permissible · allowable · tolerable · reasonable · justifiable

likelihood/plausibility

unthinkablecertain

Free from doubt

inevitable · plausible · believable · credible · likely

Family

unthinkably, unthinkability

Familiarity
Top 20,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Negative · Everyday, not technical · Rated G