Empty Components
Empty Components
夫 is 大 plus one stroke. The extra stroke pictures nothing, carries no meaning, and cues no sound. It is there so that this word does not share a written form with 大. A part like that is an empty component: a piece of a character’s form that does no work.
Two kinds of accident produce empty components. One is a mark added to keep two words from sharing one character. The other is what remains of a drawing after its shape collapsed, like the part in 射 that looks like 身.
Knowing that a part is empty is useful because the learner can stop looking for a meaning or a sound in it. The learner gives the leftover a one-line story of how it got there, makes it glass, meaning transparent, in the memory image, and moves on. There is no memory cue in those strokes.
Core takeaways
- An empty component is a part of a character that pictures nothing, carries no meaning, and cues no sound. The extra stroke in 夫 is one.
- Two accidents produce empty parts: a mark added to keep two words apart, and the remains of a drawing whose shape collapsed.
- A shape change counts as corruption only when it damages the sound or meaning work the part was doing. Corruption often empties a part, but the work that remains decides the filing, case by case.
- An empty part gives the learner nothing to remember it by. That gap invites false stories, such as the archer in 射 pulling a string toward his body.
- The fix is a one-line story of how the part became empty, plus a memory image in which the empty part is glass.
- A part is called empty only after its picture, meaning, and sound have all been checked and none is found.
Marks added to keep two words apart
Early script let one character write several words. Context told the reader which word was meant. Later, writers needed to show the difference on the page.
One way to show it is to add a meaning part. 月/肉 under 北 produced 背 for “back,” and 北 kept the other reading. Sound Components explains how that pair began as a sound-loan.
The other way is a distinguishing mark: an arbitrary stroke, empty from the start, that only shows that this is a different word.
夫 is 大 plus one stroke that has no connection to 一. The extra line does not mean “one.” It only separates the character from 大.
Not every stroke in a character with a mark is empty. In 少, 小 still carries meaning and sound. Only the slash is the leftover.
口 is the mark used most often. It separates 高 from 京. It originally sat where 香 now shows 日. 高 and 京 began as the same drawing of a tall building. Tall buildings stood in cities, and that sense produced “capital.” The early 口 made them two separate characters.
A mark can also be the sound component. In 句, 口 both separates the word and supplies the sound; the 勹-shaped leftover is what remains of 丩. In 千, 亻 is a real sound component, though modern Mandarin pronunciation no longer shows it, and the crossbar is the empty mark. A part that looks like a leftover may still do work, as 亻 in 千 does.
The remains of a collapsed drawing: 射
射 shows the second route. It began as a drawing of a bow and arrow. A hand, now written 寸, joined the drawing. The bow and arrow then collapsed into a shape that looks like 身. That 身 is what remains of the old drawing. The story that the archer is pulling the string toward his body treats the leftover as if it still had a meaning.
A part with no function gives the learner nothing to remember it by. The leftover is hard to remember, and that is why it invites a story of that kind: a memory cue attached to a part that has no meaning.
When a shape change counts as corruption
A change in a part’s form counts as corruption only when it damages the sound or meaning work the part was doing. A change that leaves both kinds of work readable is ordinary change.
春 was 艸 + 日 + 屯. 屯 is a credible sound component through the regular correspondence of zh-/ch-/sh- with d-/t-. Sound Series covers that family of correspondences. 屯 and 艸 fused into 𡗗, which is empty. The same 𡗗 appears in 奏, 泰, 奉, 秦, and 舂. In each of them it came from corruption. The original parts differ from character to character, except that 秦 and 舂 share the same original parts. Identical shapes prove nothing about origin.
Sound components can be hidden by the same kind of change. 外’s 月/yuè is now 夕. 布’s 父 is now ナ. 早’s 棗 is now 十. Those parts once cued sound. Sound Components covers what they used to do.
Deciding whether a damaged part is empty
Whether a part is damaged and whether it is filed as empty are two separate judgments. The corrupted top of 表 still counts as the sound component 毛. The corrupted 夕 of 外 is filed as empty. Corruption often empties a component. It never does so automatically. The work the part still does decides the filing, case by case.
Mnemonics should be built on real structure only. Cutting 偷 into a person on a roof at night with a knife invents parts the character does not have. That mnemonic should not be used.
Meaning Trees and Original Meanings covers original senses. When a leftover is the remains of an older drawing, the older sense is often now written by a later character.
What to do with an empty part
The repair is two moves. Neither move needs paleography.
First, attach a one-line story of the cause: “mark splitting this character from its twin,” or “corroded bow-and-arrow.”
Second, make the empty part glass in the memory image. Glass means transparent, so what is stored is the instruction to ignore this part. For 射, picture an archer statue with the drawing hand solid and the body made of glass. Recalling the picture recalls which parts to ignore.
Two other sources of memory cues are allowed. A traditional explanation may be kept if it is marked as historically false. The story of the bowstring pulled toward the body is easy to remember because it treats the leftover as if it had a meaning. The learner’s own imagination may also be used. A false story is allowed when it is marked as false. Presenting a false story as the real origin is not allowed.
Universities in Taiwan and China teach corruption as graduate paleography. A learner needs only the one-line story and the glass image. Both let the learner stop looking for a memory cue that the strokes do not hold. Rules of Effective Memorization gives the general rule for all subjects: store what is there, and do not invent a cue to make the leftover seem to have a function.
When to call a part empty
A part is judged empty only after its picture, meaning, and sound have been checked and none is found. For that reason How Chinese Characters Work lists empty components last, after the three jobs have been checked. Surface vs Deep Structure covers the cases where the surface shape misleads most. Those are the cases where a leftover most often gets mistaken for a working part.
How to practice this
- Before calling a part empty, check whether it pictures something, carries a meaning, or cues a sound. If it does any of the three, it is not empty. In 少, 小 still carries meaning and sound, and only the slash is left over.
- Ask which accident made the part empty. Either a mark was added to keep two words apart, or an older drawing collapsed. Notice that the answer gives you the one-line story.
- Write the one-line story for the part. “Mark splitting this character from its twin” and “corroded bow-and-arrow” are the two forms. Notice that the story names a cause and gives the part no meaning.
- Build the memory image with the empty part as glass. For 射, picture an archer statue with the drawing hand solid and the body glass. When you recall the picture, notice that you also recall which parts to ignore.
- If you keep a traditional story, mark it as historically false. Notice that the bowstring story is easy to remember only because it treats the leftover as meaningful.
- Check any mnemonic against the character’s real parts. If it cuts the character into parts it does not have, drop it. The person on a roof for 偷 is that kind of cut.
Related pages
- How Chinese Characters Work: the hub. Empty components come last there because emptiness is decided by elimination.
- Three Attributes of a Character: the three attributes that an empty part falls outside.
- Surface vs Deep Structure: where surface shape misleads most.
- Sound Components: what buried sound components once did; the origin of 北/背.
- Sound Series: why 屯 is a credible sound component for 春.
Open questions
- Decorative regularization, strokes added only to even out a shape, may be a third route into emptiness. It is not yet a third category.
- After damage, whether a part is still a sound component or is empty stays case by case. The work that remains decides, not the fact of damage. No mechanical test is given.
- Whether the glass convention holds up at the volume of real reading is untested.
Sources
- Dong Chinese character etymology for 射: hand pulling a bowstring with an arrow; later written 身+寸. Public paleography, not a course.
- 說文解字 (Shuowen Jiezi) on 射: already reads 身 as the body in the scene: the folk etymology this page treats as residue reanalyzed, not as origin.