事 shì began as a picture of a hand holding the implements of office. The oracle-bone form shows a hand gripping an upright object, read variously as a hunting standard, a writing brush, or a banner of office. Whatever the exact tool, the image is of someone holding the instrument of a duty. From that single picture three closely related characters fanned out: 事 shì (the affair, the matter handled), 吏 lì (the official who handles it), and 史 shǐ (the scribe who records it). All three trace back to the same hand-and-implement source, and in the earliest texts they were barely distinguished.

The modern shape is opaque, a tangle of strokes ending in the hook 亅 (jué) that gives the character its radical. There is no clean "this part plus that part" breakdown to recover; what survives is the ending hook of the old upright implement. So 事 is best learned not by pulling it apart but by holding onto its idea: the thing one is occupied with.

That idea is wide. 事 covers the whole field of abstract matters that fill a life:

1. A matter, an affair. Anything that happens or must be dealt with: 事情 shìqing (matter), 没事 méishì (it's nothing), 出事 chūshì (something went wrong).
2. Work, an undertaking. A job or a life's project: 事业 shìyè (career, enterprise), 做事 zuòshì (to work, to handle things).
3. An event or incident, often a bad one. 事故 shìgù (accident), 事件 shìjiàn (incident, event).

Crucially, 事 is abstract. It names a matter or happening, never a physical object. The physical "thing" is 东西 dōngxi or 物 wù. You can 有事 (have a matter to attend to) but you cannot 有事 to mean "own an object." That split, affair versus object, is the single most useful thing to fix about 事.

Once 事 means "the thing one is occupied with," the words that grow from it sort neatly. A 事 shared with others at work makes a 同事 tóngshì, literally "same-affair person," a colleague. A 事 strung into a telling becomes a 故事 gùshi, an "old matter" retold as a story. And a 事 taken up as a life's purpose becomes 事业 shìyè, a career or enterprise. The character keeps its abstract core throughout: in every case it is a matter, an undertaking, never an object.

In everyday speech 事 becomes shorthand for "a problem" or "something going on," and the two phrases 没事 méishì and 有事 yǒushì carry an enormous load. 没事, literally "no matter," is the all-purpose Chinese "it's nothing, no problem, never mind, are you okay." 有事, "have a matter," means you are busy, something has come up, or there is a problem to deal with. In the north you will hear them with the 儿 ending: 没事儿 méishìr, 有事儿 yǒushìr.

The same colloquial 事 drives 出事 chūshì, "something went wrong" (an accident, a crisis), and 闹事 nàoshì, "to make trouble." When a Chinese speaker asks 你怎么了，没事吧？ they are asking, with one small character, whether anything is the matter.

Picture a hand gripping the brush or banner of office, the old image inside 事. That hand is busy: it is occupied with a matter. Hold onto that one idea and every 事-word follows. The matter itself is 事情. The matter retold is a 故事. The matter shared at work makes a 同事. The matter taken up for life is a 事业. The matter gone wrong is a 事故.

And when the hand is empty, 没事: no matter, nothing wrong, all is well. The whole range of the character, from a traffic accident to a gentle "don't worry about it," lives in that one busy or resting hand. Remember too that the hand never holds an object: 事 is always the affair, never the thing. For objects, reach for 东西.