37. The "Big" Radical: 大
Coyotes have moved into neighborhoods in my area. People say that if you encounter one of these animals, you can protect yourself by looking as big as possible. It turns out that that's also the idea behind this pictograph:
大 (53: big; general, very; university)
Henshall (the source of all etymologies in this Radical Note) says that 大 is a pictograph of a "person standing with arms and legs spread out to look as large as possible." Did they have coyotes in ancient China?!
This shape is not only a kanji but also radical 37, the "big" radical. And 大 is the on-duty radical in the kanji 大 itself, as well as in 15 other Joyo kanji.
Photo Credit: Eve Kushner
What Is the 大 Radical Called?
The 大 radical often "sits" on the "baseline" of a kanji and occupies much of that character, as in these examples:
天 (58: sky, heavens; weather; nature; top; Uranus)
太 (164: thick; large; great)
央 (429: center)
失 (501: to lose; mistake)
夫 (573: husband; male worker; man)
奥 (1038: deep part; wife)
When the radical is in that position, we can call it だい. That yomi comes from ダイ, one of the two Joyo on-yomi of the 大 kanji (the other being タイ).
Photo Credit: Eve Kushner
When the 大 Radical Tops Off a Kanji
The on-duty 大 radical rises to the top in these kanji:
奮 (966: to rouse; energetically)
奇 (1123: extraordinary; odd number)
奪 (1561: to seize)
奉 (1793: to offer; dedicate; revere nominally)
奔 (1825: rush)
奈 (2085: ナ sound)
When the radical is in that upper position, we can call it だいかしら or だいかんむり. As explained in Radical Terms (go to the section "Radical Positions" and look at "Positions 3–4"), かしら (頭) corresponds to "head," and かんむり (冠) means "crown."
For some strange reason, most of the kanji in this second group are less common than those in the first group. I have absolutely no idea why the 大 would sit atop less popular kanji. It must be a fluke.
Photo Credit: Eve Kushner
Photo Credit: Eve Kushner
What Is Big in These Kanji?
The sky is bigger than any human can conceive of, so is that why the 大 radical is in 天? And what part of a 夫 (husband) is purported to be big?! Let's see what Henshall says about the 大 radical in a handful of kanji:
天 (58: sky, heavens; weather; nature; top; Uranus)
In this character, the 大 shape means "person." The stroke above that is an "exaggerated head," symbolizing "uppermost" or "upper part." By association, 天 came to mean "that up above."
太 (164: thick; large; great)
The shape has been simplified over the years, but originally the character contained two instances of 大 for emphasis. As such, the character meant "very big."
夫 (573: husband; male worker; man)
The character initially depicted a "big (i.e., adult) male" (大) with an ornamental "hairpin" (the topmost 一) through his hair, the hairpin indicating "adulthood" in ancient China.
奔 (1825: rush)
Instead of the neatly nested strokes under 大, there was once a pyramid of three 止 shapes. The 大 depicted a “person with legs apart to indicate running while waving arms,” and each 止 represented “foot,” says Henshall in his newer edition. The 止s were then replaced by 卉 (vegetation, grass), which acted phonetically to express “hurry.” Either way, the whole character meant “run fast.”
As these examples show, 大 can represent not only "big" but also "person," as was true in the etymology of the kanji 大 (53).
Photo Credit: Eve Kushner