cloth
綌 centers on a specific type of coarse cloth or fabric, often made from plant fibers. The meaning is narrow and concrete, referring to the material itself.
綌 combines 糸 (thread) with 谷, which likely contributes the sound. The character originally referred to a coarse hemp fabric.
The left side 糸 is thread, and the right side 谷 looks like a valley. Imagine coarse cloth woven from threads gathered in a valley, producing a rough fabric.
For ケキ, picture a piece of coarse cloth catching on a key: key -> ケキ, and the rough fabric snags on the key.