Definition

Something that cannot be imagined or considered; it is beyond what seems possible or reasonable.

Example

The idea of giving up was unthinkable to her.

Conversation

Did you hear about the unthinkable decision they made at work?

Yeah, I couldn't believe it either!

I thought that was completely out of the question.

Same here, it's just so hard to wrap my head around it.

Synonyms & Antonyms

Root Explanation

Unthinkable → It is formed from "un-" (meaning not) and "think" (from Old English "þencan", meaning to conceive in the mind). The word "unthinkable" means something that cannot be conceived or imagined in the mind.

Memory Tip

Think of 'not' ('un-') being added to 'think' — this helps you remember that 'unthinkable' refers to something that cannot be imagined.

Visually Confused Words