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ken (noun) (usually used as part of the phrase, “beyond one’s ken”) range of knowledge.
If something is beyond your ken you do not enough about it. It is not among the things that you know. When something is not within your ken to answer, you do not know about it, so you can’t say anything about it. Any thing that you do not know is beyond your ken.
- The phenomenon of planets, stars, the solar system, etc., was beyond the ken of the human beings of ancient times. They were ignorant of it.
- The real causes and cure of diseases like cancer and AIDS are still beyond the ken of modern medical science.