by Phillip Starr
Take the characters for “ninja” for example (忍者). The first character, “nin”, is comprised of two radicals. The uppermost radical is “dao” in Chinese (刀) and means “knife.” Actually, it refers to a type of sword with a curved, single-edged blade (broadsword). The bottom radical, “shen” (心) refers to the heart. Taken together, this whole character means “endure.” The second character, “ja” (者), refers to a person. So this tells us that a ninja is a person who can endure a great deal – remember, having a razor-sharp blade hung ABOVE your heart (thus, the placement of the radicals; the radical for the sword is above the radical for the heart) is a bit stressful, right? But such a man can endure this kind of stress and difficulty.
Now let's look at the well-known “knife-hand” (刀手), which is called “shou-dao” in Chinese and “shuto” in Japanese. The first radical is “dao” (刀) in Chinese and “to” in Japanese (pronounced “toe”, it's just one of several words for “sword” that the Japanese use), which doesn't really refer to a knife as we think of it. Rather, it refers to a curved, single-edged sword (broadsword). The second radical is “shou” (手) in Chinese and “te” in Japanese. The Japanese pronunciation of the Chinese character, which they kept, is “shu.” So the name is literally “sword-hand” or “hand-sword.” But there's more to it that just simple semantics; it tells you something about the technique itself...
The Chinese and Japanese character for sword (jien in Chinese, and ken in Japanese, 剑) refers to a straight, double-edged sword. But this isn't the character used for the technique; that particular character refers (in both Japanese and Chinese) to a curved, single-edged blade. The key word in that statement is CURVED. If, when you execute a “knife-hand strike”, your hand and arm are aligned in a straight line, it's wrong; it should be gently curved from the tip of the little finger clear to the shoulder because your entire arm is supposed to represent the curved blade! And this curvature actually begets greater striking power.
I think you should be able to understand the importance of learning the characters and dissecting them so as to decipher the meaning of the radicals that form them. It can really give you much deeper insight into the art that you practice and/or teach.