Meaning
The kanji 潤 (JUN, uruou, uruosu, urumu) is a versatile character that primarily conveys concepts of moisture, wetness, enrichment, and profit. Its core meaning revolves around something being adequately supplied with liquid, often leading to a state of health, vitality, or abundance. Beyond the literal sense of 'moistening,' it extends metaphorically to 'enriching' or 'benefiting' something or someone, from one's life or finances to a story or conversation.
The visual structure of 潤 offers clear insight into its origins and meaning. On the left side, you'll find the radical 氵 (sanzui), a variant of 水 (mizu), meaning 'water.' This radical immediately signals that the kanji's meaning relates to water, liquids, or moisture. The right side of the kanji is 閏 (jun), meaning 'intercalary' or 'extra (month/day).' In this context, it functions primarily as the phonetic component, giving the kanji its on'yomi reading 'JUN.' While 閏 itself doesn't directly mean 'moist,' its ancient forms or related characters may have carried connotations of 'smoothness' or 'glossiness,' or it might have simply served as a sound indicator. The combination of 'water' (氵) and 'smooth/extra' (閏) logically suggests water making something smooth, glossy, or sufficiently saturated—leading to meanings like 'moisten' or 'enrich.' This suggests that an 'extra' amount of water or liquid provides a beneficial, enriching effect.
This kanji consists of 15 strokes and is a Jōyō Kanji, typically learned in secondary school. Its advanced level places it at JLPT N1 for Japanese language learners.
Readings
On'yomi (音読み) — Chinese-derived readings
The primary On'yomi reading for 潤 is ジュン (JUN). You'll often find this reading in compound words, where it tends to appear in more abstract or formal contexts related to lubrication, abundance, or profit.
- 潤滑 (junkatsu) — lubrication; smoothness. This term refers to the act of making something smooth and friction-free, often with the help of oil or grease.
例：機械に潤滑油を差す。
(Kikai ni junkatsuyu wo sasu.)
Apply lubricant to the machine.
- 利潤 (rijun) — profit; returns. This refers to the financial gain obtained from a business or investment.
例：企業は多大な利潤を上げた。
(Kigyō wa tadai na rijun wo ageta.)
The company made significant profits.
- 潤沢 (juntaku) — abundance; richness; ample. This describes a state of having plenty, or being well-provided for.
例：資金が潤沢にある。
(Shikin ga juntaku ni aru.)
There is an ample supply of funds.
- 潤色 (junshoku) — embellishment; exaggeration (especially of a story or facts). This refers to adding details or exaggerating to make a story or situation more interesting.
例：彼は物語を潤色した。
(Kare wa monogatari wo junshoku shita.)
He embellished the story.
Kun'yomi (訓読み) — Native Japanese readings
The Kun'yomi readings for 潤 are typically used for verbs. They describe actions like becoming moist or enriched, or the state of one's eyes welling up.
- うるお.う (uruou) — to become moist; to be enriched; to be profitable. This is an intransitive verb, used when something becomes moist or gains richness on its own.
例：肌が潤う。
(Hada ga uruou.)
The skin becomes moisturized.
- うるお.す (uruosu) — to moisten; to enrich; to provide profit/benefit. This is a transitive verb, meaning someone or something performs the action of moistening or enriching something else.
例：喉を潤す。
(Nodo wo uruosu.)
To moisten one's throat.
- うる.む (urumu) — to become moist (especially eyes, with tears); to get dim/blurred. This is an intransitive verb specifically used when eyes become watery, often with tears, or when a surface becomes hazy due to moisture.
例：目が潤む。
(Me ga urumu.)
Eyes well up with tears.
Common Words & Compounds
Here are several common words and compounds using 潤. They are categorized by their nuanced meanings to help you understand their usage in various contexts.
Words related to Moisture and Smoothness:
- 潤い (uruoi) — Moisture; richness; grace; a feeling of fulfillment or vibrancy. This noun comes directly from the verb 潤う and refers to the state of being moist or enriched, both literally and figuratively.
例：生活に潤いを与える。
(Seikatsu ni uruoi wo ataeru.)
To bring richness to one's life.
- 潤滑油 (junkatsuyu) — Lubricant; lubricating oil. This is a direct compound combining 潤滑 (lubrication) and 油 (oil).
例：機械の動きを滑らかにするため、潤滑油が必要だ。
(Kikai no ugoki wo nameraka ni suru tame, junkatsuyu ga hitsuyō da.)
Lubricating oil is necessary to make the machine run smoothly.
- 湿潤 (shitsujun) — Moist; humid. This compound combines 湿 (dampness) and 潤 (moisture) to describe a humid or damp condition.
例：夏は湿潤な気候です。
(Natsu wa shitsujun na kikō desu.)
Summer has a humid climate.
Words related to Profit and Abundance:
- 利潤 (rijun) — Profit; returns. As noted in the On'yomi section, this is a crucial economic term.
例：事業の拡大により、多額の利潤を生み出した。
(Jigyō no kakudai ni yori, tagaku no rijun wo umidashita.)
The expansion of the business generated a large profit.
- 潤沢 (juntaku) — Abundance; richness; ample. As mentioned earlier, this describes having an abundant supply.
例：彼は潤沢な資金で新しい事業を始めた。
(Kare wa juntaku na shikin de atarashii jigyō wo hajimeta.)
He started a new business with ample funds.
- 富潤 (fujun) — Richness; prosperity. This combines 富 (wealth) and 潤 (enrichment) to emphasize prosperity and abundance.
例：経済の発展が社会に富潤をもたらす。
(Keizai no hatten ga shakai ni fujun wo motarasu.)
Economic development brings prosperity to society.
Verbal usages:
- 潤す (uruosu) — To moisten; to enrich. This is the transitive verb form.
例：音楽は心を潤す。
(Ongaku wa kokoro wo uruosu.)
Music enriches the soul.
- 潤む (urumu) — To get moist (eyes); to be blurred. This intransitive verb is often used to describe eyes welling up with tears, or a surface becoming hazy from moisture.
例：感動で目が潤んでくる。
(Kandō de me ga urundekuru.)
My eyes are welling up with emotion.
Other compounds:
- 筆潤 (hitsujun) — (Historical term) Remuneration for writing; a writer's fee. Literally 'brush moisture,' it refers to the payment given for literary work.
例：彼はその小説で多額の筆潤を得た。
(Kare wa sono shōsetsu de tagaku no hitsujun wo eta.)
He received a large writer's fee for that novel.
- 潤色 (junshoku) — Embellishment; exaggeration (as above). This term can also apply to adding vividness or flair to a narrative or situation.
例：事実を潤色するのは良くない。
(Jijitsu wo junshoku suru no wa yoku nai.)
It's not good to embellish facts.
Example Sentences
乾燥した肌が化粧水で潤いました。
Kansō shita hada ga keshōsui de uruoimashita.
My dry skin became moisturized with the toner.
雨が降り、大地が潤された。
Ame ga furi, daichi ga uruosareta.
Rain fell, and the earth was moistened.
このリップクリームは唇をしっかり潤します。
Kono rippu kurīmu wa kuchibiru wo shikkari uruoshimasu.
This lip balm thoroughly moisturizes the lips.
事業の成功により、多大な利潤が生まれました。
Jigyō no seikō ni yori, tadai na rijun ga umaremashita.
Significant profits were generated due to the success of the business.
感動的な物語を聞いて、私の目が潤んだ。
Kandōteki na monogatari wo kiite, watashi no me ga urunda.
Upon hearing the moving story, my eyes welled up with tears.
豊富な水資源がこの地域の農業を潤沢にしています。
Hōfu na suishigen ga kono chiiki no nōgyō wo juntaku ni shiteimasu.
Abundant water resources make agriculture in this region prosperous.
彼の穏やかな声は、聞く人の心を潤す力がある。
Kare no odayaka na koe wa, kiku hito no kokoro wo uruosu chikara ga aru.
His calm voice has the power to enrich the hearts of those who listen.
会議を円滑に進めるために、彼は潤滑油のような役割を果たした。
Kaigi wo enkatsu ni susumeru tame ni, kare wa junkatsuyu no yō na yakuwari wo hatashita.
To proceed with the meeting smoothly, he played a role like a lubricant.
事実に少々潤色を加えて話すのは、彼の癖だ。
Jijitsu ni shōshō junshoku wo kuwaete hanasu no wa, kare no kuse da.
It's his habit to tell stories by slightly embellishing the facts.
適切な政策は、国民の生活を豊かに潤すと期待されている。
Tekisetsu na seisaku wa, kokumin no seikatsu wo yutaka ni uruosu to kitai sarete iru.
Appropriate policies are expected to richly enrich the lives of the citizens.
Memory Tip
To remember 潤, visualize its components. On the left, the 'water radical' (氵) will always remind you of liquids and moisture. On the right is 閏, which you can break down into 門 (gate) and 王 (king). Imagine a 'king' (王) opening a 'gate' (門) to allow 'water' (氵) to flow freely and abundantly. This act 'moistens' and 'enriches' the land, bringing life, growth, and prosperity, making things lush and profitable. So, you can remember it with: "The king opens the gate, and water flows, bringing moisture and profit to all."