Definition of Unthinkable
unable to be thought of or conceived
Examples of Unthinkable in a sentence
At one time, the notion of a round Earth was considered unthinkable, and even heretical by some members of the church.
My brother and I have been together for so long, that any thought of betraying him is unthinkable.
We thought a rebellion was unthinkable, but apparently the people of the country were more than willing to revolt.
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