unthinkable

Meaning

  1. Incapable of being believed; incredible.
  2. Inconceivable or unimaginable; extremely improbable in a way that goes against common sense.
  3. Extremely improper; extremely at odds with norms of expected behavior; taboo.

Frequency

C2
Pronounced as (IPA)
/ʌnˈθɪŋkəbəl/
Etymology

From un- + think + -able.

Notes

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