Other forms: insights
An insight is the moment a thing makes sense. You have been staring at a problem for an hour, and then you see how it actually works — not a fact somebody told you, but something you saw for yourself.
Insight comes in two sizes. One insight is a single clear realisation you could write on a card; insight with no article in front of it is the general ability to see into things, which is what people mean by a doctor with real insight or a book full of insight. It takes into: insight into how children learn, insight into the market. Business has turned it into a job word — customer insights, data insights — and that flattens it, but the test still holds: something true that was not obvious. Medicine uses it more narrowly, for a patient's awareness of their own condition. And it is a noun, always; the adjective you want is insightful.
1nouninsightA sudden clear understanding of how something really works.~6%
“Her first insight was that nobody had read the instructions.”
synonyms: realisation, revelation
2nounperceptionThe ability to see into things and understand them deeply.~87%
“He writes about music with rare insight.”
synonyms: perception, understanding, judgement
3nounmarketingA useful truth about customers or behaviour drawn out of data.~5%
“The team brought three insights back from the survey.”
4nounmedicineIn medicine, a person's awareness of their own condition.~2%
“The patient had little insight into how ill he was.”
Shares are an estimate: a language model read 165 sentences found in the wild and placed 106 of them on a sense (59 were unclear) — a count of our sample, not a measurement of English.
Insight is in plus sight, and it has meant mental vision since Middle English — insiht, seeing into a thing rather than merely at it. The neighbouring languages all built the same word out of the same two pieces: Dutch inzicht, German Einsicht, Swedish insikt. English did not borrow this one. It made it.
Proto-Germanic
*insahtiz — account, narrative, argument
Old English
insiht — narrative, argument, account
Middle English
insight
English, today
insight
Built from
From Middle English insight, insiht (“insight, mental vision, intelligence, understanding”), equivalent to in- + sight. Perhaps continuing Old English insiht (“narrative, argument, account”), from Proto-Germanic insahtiz (“account, narrative, argument”). Compare West Frisian ynsjoch (“insight”), Dutch inzicht (“insight, awareness, view, opinion”), German Low German Insicht (“insight”), German Einsicht (“insight, knowledge, perception, understanding”), Danish indsigt (“insight”), Swedish insikt (“insight”), Icelandic innsýn (“insight”).
Etymology from Wiktionary, CC BY-SA