揺らす

The Japanese verb 揺らす (yurasu) is a quintessential transitive verb that describes the intentional or external act of causing something to swing, sway, or shake. Unlike its intransitive counterpart 揺れる (yureru), which describes something moving on its own or as a result of an unseen force like an earthquake, 揺らす implies an agent—be it a person, the wind, or a mechanical force—actively initiating the motion. This distinction is crucial for Japanese learners at the B1 level, as mastering the transitive-intransitive pairs is a hallmark of moving toward intermediate fluency. The word captures a wide range of physical movements, from the gentle rocking of a cradle to the violent shaking of a tree to dislodge fruit. It is also deeply embedded in the Japanese aesthetic of 'movement within stillness,' often used in literature to describe the wind rustling leaves or the ripples on a pond caused by a dropped stone.

Grammatical Category

Transitive Godan Verb (他動詞・五段活用)

Core Nuance

Deliberate or external cause of oscillation or vibration.

In everyday life, you will encounter 揺らす in domestic settings. A parent might 'yurasu' a cradle (yurikago) to soothe a baby. In a playground, children 'yurasu' the swings (buranko) to go higher. The scale of the movement can vary significantly; it can be the minute vibration of a tuning fork or the massive swaying of a bridge under heavy load. The verb also extends into the metaphorical realm, particularly in the context of emotions and societal stability. When a powerful piece of music or a moving speech 'shakes' your heart, the verb 心を揺らす (kokoro o yurasu) is used to describe that profound emotional resonance. Similarly, a scandal that 'shakes' the foundations of a government or a company uses this verb to indicate a loss of stability and the introduction of chaotic movement into a previously steady structure.

Culturally, the concept of 'shaking' in Japan is often associated with the natural environment. Given Japan's history with seismic activity, verbs related to shaking carry a weight of both fear and awe. However, 揺らす is more often associated with controlled or observable external forces rather than the terrifying, invisible force of an earthquake (which is usually 揺れる). In traditional Japanese dance (Buyo) or theater (Kabuki), the deliberate 'yurasu' of a fan or a sleeve is a highly codified gesture used to signify wind, water, or even the fluttering of a heart. This demonstrates that the word is not merely functional but also carries significant expressive potential in the arts. Understanding the physical mechanics of the verb helps in grasping its metaphorical extensions: to shake something is to take it out of its state of rest, to challenge its equilibrium, and to force it into a state of dynamic change.

Physical Usage

Shaking a bottle, swinging a hammock, rocking a boat.

Metaphorical Usage

Stirring emotions, destabilizing a market, unsettling a person's resolve.

Finally, it is worth noting the relationship between 揺らす and rhythmic movement. In music, a performer might 'yurasu' the rhythm to create a sense of 'swing' or 'groove.' This is less about literal shaking and more about the fluid, intentional deviation from a rigid beat. In the culinary world, 'yurasu' might describe the gentle agitating of a pan to ensure even cooking without breaking the ingredients. These varied applications highlight the verb's versatility. Whether it is the destructive force of a storm shaking a building or the tender act of rocking a child to sleep, 揺らす encompasses the spectrum of external influence over physical and emotional states. By mastering this word, learners can describe complex interactions between subjects and their environments with precision and nuance.

Using 揺らす (yurasu) correctly requires an understanding of sentence structure and the nature of the object being acted upon. As a transitive verb, the basic pattern is [Subject] が [Object] を 揺らす. The subject is the cause of the movement, and the object is the recipient. This structure allows for a high degree of specificity regarding *who* or *what* is responsible for the motion. For instance, in a sentence like 'The wind shakes the window,' the wind (kaze) is the subject and the window (mado) is the object. This clarity of agency is what distinguishes 揺らす from intransitive verbs where the cause might be obscure or irrelevant. When using this verb, always look for the 'shaker' and the 'shaken.'

Basic Structure

Noun (Agent) + が + Noun (Target) + を + 揺らす

One of the most common applications of 揺らす is in the context of physical objects that are suspended or designed to move. Consider a hammock (hamokku). If you are pushing someone in a hammock, you are 'hamokku o yurashite iru.' The verb here captures the rhythmic, back-and-forth motion. Similarly, if you are on a boat and you lean from side to side to make it rock, you are 'fune o yurasu.' In these cases, the verb implies a continuous or repeated action. To express a single, sudden shake, you might use different vocabulary, but 揺らす is perfectly capable of describing both sustained rocking and discrete instances of shaking depending on the context and accompanying adverbs.

When moving into the figurative or emotional domain, the object of 揺らす often becomes something intangible, such as a heart (kokoro), feelings (kimochi), or even a person's resolve (ketsui). This is a very common trope in Japanese literature and song lyrics. For example, 'Kanojo no utagoe wa watashi no kokoro o yurashita' (Her singing voice shook my heart). Here, the 'shaking' is a metaphor for being deeply moved or affected. It suggests that the person's internal state was disturbed from its calm, resulting in an emotional vibration. This usage is highly evocative and adds a layer of poetic depth to your Japanese. It implies that the impact was not just felt but caused a fundamental shift or oscillation in the person's being.

In more formal or technical contexts, 揺らす can describe the act of causing vibrations for a specific purpose. For example, in a laboratory setting, a scientist might 'shake' a test tube to mix chemicals. In construction, machinery might 'shake' the ground to settle foundations. While technical terms like 振動させる (shindou saseru - to cause to vibrate) exist, 揺らす remains the more common, natural choice for general descriptions of causing movement. It's also found in idiomatic expressions like 'binbou-yusuri' (fidgeting with one's legs), which literally translates to 'poor man's shaking.' This refers to the nervous habit of bouncing one's knee while sitting, which was traditionally thought to 'shake away' one's fortune.

Collocation: Nature

嵐が家を揺らす (The storm shakes the house.)

Collocation: Interaction

肩を揺らして笑う (To laugh so hard your shoulders shake.)

Finally, consider the passive and causative forms. 'Yurasareru' (to be shaken) is often used when the subject is affected by an external, often overwhelming force, such as being 'shaken' by fate or a sudden realization. 'Yurasaseru' (to make/let someone shake) might be used in a context where someone is instructed to shake something, like a teacher telling a student to shake a tree. Understanding these variations allows you to navigate complex social and physical interactions. Whether you are describing the gentle swaying of a bell in a temple or the chaotic shaking of a vehicle on a bumpy road, 揺らす provides the linguistic tools to articulate the cause and effect of movement with clarity and grace.

The word 揺らす (yurasu) is ubiquitous in Japanese daily life, media, and literature, making it an essential addition to any learner's vocabulary. One of the most common places you will hear it is in the context of nature and weather reports. When a typhoon or a strong low-pressure system is approaching, meteorologists will often describe the wind 'shaking' the trees, buildings, or power lines. In this context, it conveys a sense of power and potential danger. Similarly, in news reports about transportation, you might hear about waves 'shaking' a ferry or turbulence 'shaking' an aircraft. These real-world applications help anchor the word in concrete, physical reality, allowing you to visualize the motion it describes.

News/Weather

Strong winds shaking (yurasu) infrastructure or natural features.

Entertainment

Lyrics describing emotional upheaval or the physical act of dancing.

In the realm of Japanese pop culture, particularly J-Pop and anime, 揺らす is a favorite among lyricists. It is frequently used to describe the emotional impact of love, longing, or inspiration. Phrases like 'kokoro o yurasu' (shaking the heart) or 'omoi ga yureru' (feelings sway) are common. In these contexts, the word takes on a romantic or sentimental quality. For instance, a song might describe the evening wind 'shaking' the curtains as a metaphor for the protagonist's unsettled feelings. This artistic usage teaches you that 揺らす is not just a mechanical verb but a tool for expressing subtle shifts in mood and atmosphere. When you hear it in a song, pay attention to the surrounding words—they will often point to a deeper emotional state.

Another common setting for 揺らす is in childhood and family life. Parents and teachers use the word constantly when interacting with children. You'll hear it at playgrounds ('Don't shake the slide!'), in nurseries ('Let's rock the cradle gently'), and during playtime ('Shake the bells to the music!'). Because it is a basic verb of motion, it is one of the first transitive verbs Japanese children learn to use in relation to their toys and environment. For a learner, listening to these simple, direct interactions can provide a clear model for how the verb functions in its most literal sense. It also appears in common warnings, such as 'Don't shake the table while I'm writing!' (Kaite iru toki ni tsukue o yurasanaide!).

In professional or specialized environments, the word takes on more specific meanings. In the world of sports, particularly in soccer or basketball, a player might 'yurasu' the net (netto o yurasu) when they score a goal or a basket. This is a very common idiomatic expression in sports commentary, emphasizing the physical impact of the ball hitting the net. In a business context, a major market shift or a significant new product might be said to 'yurasu' the industry (gyoukai o yurasu). This implies a disruption of the status quo. Hearing the word in these diverse contexts—from the soccer field to the boardroom—demonstrates its flexibility and the importance of understanding its core meaning of 'causing movement to change the current state.'

Sports Commentary

'Netto o yurasu' (Shaking the net) means scoring a goal.

Daily Life

'Tsukue o yurasu' (Shaking the desk) or 'Karada o yurasu' (Swaying the body).

Lastly, you will encounter 揺らす in literature and poetry, where it is used to create vivid imagery. A writer might describe the moon's reflection 'shaken' by the ripples in a lake, or a character's voice 'shaking' the air in a silent room. These uses are more abstract but rely on the reader's understanding of the physical sensation of shaking. By paying attention to where you hear 揺らす—whether it's in a dramatic anime scene, a casual conversation at a park, or a formal news broadcast—you will gain a holistic understanding of how this simple verb functions as a powerful tool for describing both the physical and the metaphysical world.

The most frequent mistake learners make with 揺らす (yurasu) is confusing it with its intransitive counterpart, 揺れる (yureru). In Japanese, the distinction between transitive (someone does something to an object) and intransitive (something happens) is extremely strict. Using 揺れる when you mean 揺らす can lead to sentences that sound like things are happening spontaneously without a cause. For example, if you want to say 'I shook the tree,' you must use 'Ki o yurashita.' If you say 'Ki ga yureta,' it means 'The tree shook,' which could imply it happened because of the wind or an earthquake, not necessarily because of you. Mastering this pair is a major step in B1 level proficiency.

Common Error: Transitivity

Confusing 'yurasu' (transitive) with 'yureru' (intransitive).

Common Error: Word Choice

Using 'yurasu' when 'furueru' (shiver/tremble) or 'furumau' (behave) is meant.

Another common pitfall is the confusion between 揺らす and 振る (furu). While both can be translated as 'to shake' in English, their usage is quite different. 振る is typically used for smaller objects or specific motions like 'shaking hands' (akushu o furu - actually 'akushu suru', but 'te o furu' is waving), 'shaking a tail' (shippo o furu), or 'shaking a salt shaker.' It often implies a waving or swinging motion of a specific extremity. 揺らす, on the other hand, is used for causing a larger object or a whole structure to sway or rock. For example, you 'yurasu' a boat, but you 'furu' a hand. If you tell someone to 'yurasu' their hand, they might try to shake their whole arm or body, which would look quite strange!

Learners also often struggle with the distinction between 揺らす and 震わせる (furuwaseru - to make something tremble). 震わせる is generally used for involuntary or high-frequency vibrations, such as trembling from cold, fear, or anger. It is also used for the vibration of vocal cords. If you say you 'yurashita' your voice, it sounds like you were physically moving your neck to make your voice wobble, whereas 'koe o furuwaseru' means your voice was trembling due to emotion. This subtle difference is vital for conveying the correct emotional state. Similarly, for small, fast vibrations like a phone on silent mode, 振動させる (shindou saseru) is more appropriate than 揺らす.

The metaphorical usage of 揺らす can also lead to mistakes. While 'kokoro o yurasu' is a common and beautiful expression for being moved, you cannot use it for every kind of emotional change. For instance, if you want to say someone made you angry, you wouldn't use 揺らす. It specifically refers to being 'shaken' in a way that suggests impact, resonance, or a loss of emotional equilibrium. Furthermore, in business contexts, 'shaking' a market (shijou o yurasu) is correct, but 'shaking' a person's opinion is often better expressed with 'yusuburu' (to unsettle/jolt) or 'kaeru' (to change). Using 揺らす in a context that requires a more forceful or specific verb can make your Japanese sound slightly 'off' or childish.

Mistake: Inappropriate Object

Using 'yurasu' for small objects like salt shakers or dice (use 'furu').

Mistake: Involuntary Motion

Using 'yurasu' for shivering from cold (use 'furueru').

Finally, watch out for the particle usage. Since 揺らす is transitive, it *must* take the particle を (o) for the object being shaken. Learners sometimes mistakenly use が (ga) as if it were an intransitive verb. 'Cradle ga yurasu' is grammatically incorrect; it should be 'Cradle o yurasu' (shake the cradle) or 'Cradle ga yureru' (the cradle shakes). By keeping a close eye on transitivity and the specific scale and nature of the movement, you can avoid these common errors and use 揺らす like a native speaker. Practice by identifying the 'source' of the movement in every sentence you create.

Japanese is rich in verbs that describe different types of shaking and moving. Understanding the alternatives to 揺らす (yurasu) will help you choose the most precise word for any situation. The most direct alternative is 揺さぶる (yusuburu). While 揺らす describes a general act of shaking or swinging, 揺さぶる often implies a more vigorous, forceful, or profound shaking. It is frequently used in sports (e.g., 'yusuburu' an opponent's defense) or in emotional contexts where someone is 'shaken to the core.' If 揺らす is a gentle rocking or a steady sway, 揺さぶる is a jolt or a powerful agitation that aims to unsettle or provoke a reaction.

揺らす (yurasu)

General transitive 'to shake/swing'. Neutral intensity.

揺さぶる (yusuburu)

To shake violently, to jolt, to unsettle. Higher intensity/impact.

Another important word is 振る (furu). As mentioned in the 'Common Mistakes' section, 振る is used for smaller objects and specific types of swinging or waving. You 'furu' a handkerchief, a magic wand, or a cocktail shaker. It often implies a motion that is centered at one end, like waving a hand or wagging a tail. In contrast, 揺らす is used for larger objects where the whole mass is swaying, like a building, a tree, or a large boat. If you are shaking a small bell, use 振る. If you are shaking a large temple bell that hangs from the ceiling, 揺らす might be more appropriate to describe the swaying motion of the heavy object.

For high-frequency, small vibrations, the verb 震わせる (furuwaseru) is the best choice. This is used for 'making something tremble.' It's the transitive version of 震える (furueru). Common objects for 震わせる include vocal cords (koe o furuwaseru), or even the air (kuuki o furuwaseru) when a loud sound occurs. It conveys a sense of rapid, often involuntary vibration that is quite different from the larger, slower sway of 揺らす. If you want to describe a phone vibrating on a table, you would use 振動させる (shindou saseru), which is a more technical or formal term for 'causing vibration.' Using 揺らす for a phone would make it sound like the phone is physically swinging back and forth.

In a literary or more formal context, you might encounter 揺曳する (youei suru), which means 'to sway' or 'to flicker,' often used for shadows, flames, or seaweed in the water. This is a much more sophisticated term and is strictly used for visual descriptions. Another related verb is 煽る (aoru), which means 'to fan' or 'to incite.' While not a direct synonym for 'shake,' it is often used when the wind 'fans' or 'agitates' something like a flame or a curtain, causing it to move. If the wind is making a curtain flap wildly, 'aoru' might be more descriptive than the simpler 'yurasu.' Choosing the right word depends on the scale, the speed, and the intended effect of the movement.

震わせる (furuwaseru)

To make something vibrate/tremble (fast, small motion).

振動させる (shindou saseru)

To cause vibration (technical/mechanical).

揺曳する (youei suru)

To sway/flicker (poetic/visual).

Finally, consider the verb 攪拌する (kakuhan suru), which means 'to stir' or 'to agitate' a liquid. If you are 'shaking' a liquid to mix it, this formal term might be used in a scientific or industrial context. However, in a kitchen, you would likely use 'yurasu' or 'furu' depending on the container. By expanding your vocabulary to include these synonyms and related terms, you can describe the physical world with much greater detail and avoid the repetitive use of 揺らす. Each word carries its own unique 'flavor' of movement, and learning when to use which one is a key part of achieving natural-sounding Japanese.