simplicity, brevity
簡 centers on reducing to essentials: simplicity and brevity. It suggests stripping away excess to leave only what is necessary.
簡 combines 竹 (bamboo) with 間, which likely contributes the sound. Historically, bamboo strips were used for writing brief notes or documents, linking the character to simplicity and brevity.
Bamboo 竹 over 間 (interval/space) suggests a bamboo slip with just a few characters in the space: keeping things simple and brief.
For カン, imagine a can of bamboo strips, each with a short, simple message: can -> カン, and the can holds the essence of simplicity.
simple; easy; uncomplicated
simple; simplified
concise; brief; succinct; compact (style)
simple; brief
simple; plain; modest
letter; note; epistle; correspondence
simple; easy; convenient; handy
simplicity; brevity
postal life insurance
summary court; court of summary offences
terse; concise; simple and clear
narrow, long, and thin pieces of wood strung together that were used to write on in ancient times
very easily
Pauline Epistles
the epistles of Paul; Pauline epistles
at one's discretion
the Epistles (of the New Testament)
General Epistles (James, Peter, Jude, John); Catholic Epistles; General Letters
official letter (esp. in internal company corresp.); formal letter
open letter