insane in English: Not able to think in a normal, healthy way. People also use it to mean wild or very silly. (adjective)

Translation

Not able to think in a normal, healthy way. People also use it to mean wild or very silly.

Word origin

From Latin insanus, made from in-, meaning not, and sanus, meaning healthy.

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Here "insane" means very silly and dangerous.

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In everyday speech, "insane" can simply mean very great.

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This is the old, medical use of "insane", meaning very ill in the mind.

crazy

Very silly or strange, or not sensible.

mad

Very angry. It can also mean not thinking in a normal, sensible way.

mind

The part of a person that thinks, feels and remembers.

strange

Not usual or normal; hard to understand and a little surprising.

wild

Living or growing in nature, not kept or looked after by people.

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