/ɪnˈseɪn/

New to these symbols? How to read English IPA
Line drawing of insane
Coloured illustration of insane
#1,488 of 3,000Core 5000

Meaning

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

Test yourself on insane

Three quick questions. No account needed.

Know this word? Create a free account to track it.

Word origin

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

Origin
Latin
Root
insanus
English cognates
sane, sanity

Examples

.

Here "insane" means very silly and dangerous.

.

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

.

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

Where this fits

Add to review queue

Track this word in your spaced-repetition queue and be tested on it at the right interval.

Chapters 1 and 2 free

Meet this word in a story

Every course has graded stories written only with words you have been taught, plus grammar drills, a games arcade and printable worksheets. Chapters 1 and 2 are free.

Chapters 1 and 2 free, forever. Plus: 7 days free, then $5 a month for all eleven languages.

Start learning free

English · Free printables

insane: worksheet, infographic and listicle

Free printable study downloads for the English word "insane" (Not able to think in a normal, healthy way. People also use it to mean wild or very silly.): a worksheet with the answer key built in, an infographic, and a sentence listicle. Open any one to view, print or save.

Free for members

The printable worksheets, infographics and PDFs are free with an account. Start a free week and download as many as you like.

Start your free week

This word is taught in chapter 17, lesson 11: insane, tire, borrow and 7 more words.