Meaning
The kanji 突 (totsu, tsuku) primarily means "thrust," "pierce," "poke," "butt," and by extension, "sudden" or "abrupt." It suggests a forceful, often rapid, forward motion or sudden appearance. You'll often see this kanji in contexts describing an unexpected event or a physical act of striking or pushing.
Its etymological origin offers a clear visual connection to what it means. The character is composed of two main parts. At the top is the radical 穴 (ana), meaning "hole" or "cave." At the bottom is 丁 (chou or tei), often interpreted as a "nail," "spike," a "block," or even the "sound of impact." Imagine something sharp, like a nail, suddenly emerging or being thrust out of a hole, or a block forcefully hitting against something. This composition beautifully illustrates how something might suddenly appear from an opening, or an object might be forcefully driven into or through something. It embodies both the abruptness of an event and the physical action of piercing or pushing.
Its visual shape directly reinforces its meanings. The upper part signifies an opening or space, while the lower part denotes a forceful projection or impact, creating the sense of a sudden, direct action. The kanji 突 has 9 strokes and is taught in the 3rd grade of Japanese elementary school, making it a foundational character for many common words.
Readings
On'yomi (音読み) — Chinese-derived readings
The primary On'yomi for 突 is トツ (TOTSU).
トツ (TOTSU): You'll most often hear this reading in compound words where 突 relates to "suddenness," "protrusion," "thrusting," or "collision." It often indicates an abrupt action or something forcefully moving forward or outward.
突然 (totsuzen) — meaning "suddenly," "unexpectedly." This is one of the most common uses, emphasizing its abrupt nature.
衝突 (shōtotsu) — meaning "collision," "impact," "crash," or even "conflict." Here, 突 emphasizes the forceful impact.
突破 (toppa) — meaning "breaking through," "breakthrough." This compound conveys overcoming an obstacle with force or speed.
Kun'yomi (訓読み) — Native Japanese readings
The main Kun'yomi for 突 is つ.く (tsu.ku).
つ.く (tsu.ku): This is the native Japanese verb meaning "to thrust," "to pierce," "to poke," "to prick," or "to butt (with horns)." It describes a direct, often singular and forceful, forward action. You'll find it used both transitively and intransitively, depending on the context.
棒で突く (bō de tsuku) — meaning "to poke with a stick." A direct application of the thrusting action.
相手を突き放す (aite o tsukihanasu) — meaning "to push someone away," "to cast someone off." Here, つく implies a forceful pushing action.
角で突く (tsuno de tsuku) — meaning "to butt with horns." A clear example of forceful impact using horns.
-つき (-tsuki): This reading often appears as a suffix in compound verbs or derived nouns, indicating the action of thrusting, poking, or the result of such an action. While not a standalone reading, it's crucial for understanding many related words and their nuances.
突き当たり (tsukiatari) — meaning "dead end," "end of the road," or "a collision point." It literally means "hitting the end."
突き出し (tsukidashi) — meaning "protrusion," "projection," or "a thrusting out." This is a noun form derived from the verb 突き出す.
Common Words & Compounds
The kanji 突 is quite versatile. It forms numerous compound words that convey ideas of suddenness, forceful action, and protrusion. Here are some common examples, grouped by theme:
Words related to Suddenness and Abruptness:
- 突然 (totsuzen) — suddenly, unexpectedly, all of a sudden.
- 突発 (toppatsu) — sudden occurrence, outbreak, spontaneous event.
- 突如 (totsujo) — suddenly, abruptly, without warning (slightly more literary than 突然).
Words related to Thrusting, Piercing, and Breaking:
- 突破 (toppa) — breaking through, breakthrough, overcoming (an obstacle).
- 衝突 (shōtotsu) — collision, impact, crash, conflict.
- 突撃 (totsugeki) — charge, assault, rush (often in a military context).
- 突き当たる (tsukiataru) — to run into, to collide with, to reach a dead end.
- 突き抜ける (tsukinukeru) — to pierce through, to break through, to go right through.
- 突出 (tosshutsu) — projection, prominence; to protrude, to stick out.
Specific Actions and Situations:
- 突っ込む (tsukkomu) — to plunge into, to thrust into, to retort (to interrupt sharply).
- 突っ走る (tsuppashiru) — to dash, to tear ahead, to run recklessly.
- 突く (tsuku) — (verb) to thrust, to poke, to prick, to butt.
- 突端 (tottan) — tip, extremity, promontory (a piece of land projecting into the sea).
Example Sentences
道を歩いていたら、突然雨が降り出した。
Michi o aruite itara, totsuzen ame ga furidashita.
While walking along the road, it suddenly started raining.
彼は長い棒で地面を突いた。
Kare wa nagai bō de jimen o tsuita.
He poked the ground with a long stick.
車と車が衝突し、大きな音がした。
Kuruma to kuruma ga shōtotsu shi, ōkina oto ga shita.
Two cars collided, and there was a loud noise.
私たちは難関を見事に突破した。
Watashitachi wa nankan o migoto ni toppa shita.
We splendidly broke through the difficult barrier.
予期せぬ突発事態に対応する必要がある。
Yoki senu toppatsu jitai ni taiō suru hitsuyō ga aru.
It is necessary to respond to unforeseen sudden developments.
その犬は飼い主を突き放して走り去った。
Sono inu wa kainushi o tsukihanashite hashirisatta.
The dog pushed its owner away and ran off.
道の一番奥まで行くと、突き当たりに公園がある。
Michi no ichiban oku made iku to, tsukiatari ni kōen ga aru.
If you go to the very end of the road, there's a park at the dead end.
危険が迫ると、動物は本能的に突進することがある。
Kiken ga semaru to, dōbutsu wa honnōteki ni tosshin suru koto ga aru.
When danger approaches, animals may instinctively dash forward.
彼は急に私に質問を突きつけた。
Kare wa kyū ni watashi ni shitsumon o tsukitsuketa.
He suddenly thrust a question at me.
Memory Tip
To remember 突, visualize its components: 穴 (ana, hole/cave) at the top, and 丁 (chou, a nail or a block) at the bottom. Imagine a sharp, pointed nail suddenly "thrusting" or "poking" out of a dark hole in a cave wall. This image captures both the "piercing" or "poking" action and the "sudden" or "abrupt" nature that the kanji conveys. Alternatively, think of a block (丁) making a sudden "thump" sound as it's forcefully pushed into or out of a hole (穴).