Meaning
The kanji 複 (fuku) primarily conveys the ideas of 'duplicate,' 'multiple,' 'complex,' and 'compound.' It describes something that isn't single or simple, but rather layered, repeated, or made up of several parts. This kanji is essential for expressing concepts of multiplicity and intricacy in Japanese.
Its visual composition offers a glimpse into its meaning. The kanji consists of two main components: on the left is 衣 (ころも), meaning 'clothing' or 'garment,' and on the right is 復 (ふく), which means 'to return,' 'to recover,' or 'to repeat.' Historically, the component 復 itself includes 彳 (go) and a phonetic element suggesting 'return' or 'repetition.'
When these components combine, the 'clothing' (衣) radical alongside the 'repeat/return' (復) component brings to mind images of layering clothes. It also suggests having multiple identical garments, perhaps needing to repeat a task for each layer. This idea of layering and repetition naturally expands to 'duplication,' 'multiplicity,' and 'complexity' – implying something with not just one layer, but many, making it intricate or a composite of elements. Thus, 複 represents things being doubled, manifold, or intertwined.
The kanji 複 has 14 strokes and is a Jōyō kanji, meaning it's part of the list of commonly used characters. While it doesn't have an assigned elementary school grade level, intermediate to advanced learners typically encounter it, aligning with the JLPT N2 level.
Readings
On'yomi (音読み) — Chinese-derived readings
The primary and almost exclusive On'yomi reading for 複 is フク (FUKU). You'll find this reading in nearly all compound words containing 複, highlighting its direct link to its Chinese origins.
- 複雑 (fukuzatsu) — This is one of the most common words, meaning 'complex' or 'complicated.' It describes situations, problems, or structures with many interconnected parts, making them difficult to understand or manage. For example, a 複雑な問題 (fukuzatsu na mondai - complex problem) or a 複雑な人間関係 (fukuzatsu na ningen kankei - complicated human relationships).
- 複数 (fukusū) — Meaning 'plural' or 'multiple,' this term indicates more than one of something. You might use it when asking for 複数の資料 (fukusū no shiryō - multiple documents) or referring to 複数形 (fukusūkei - plural form) of a noun.
- 複製 (fukusei) — This compound translates to 'reproduction' or 'duplication.' It refers to making an exact copy of something, such as an important document, a rare artwork, or even DNA.
- 重複 (chōfuku) — Meaning 'duplication,' 'overlap,' or 'repetition,' this word describes instances where information, tasks, or elements appear more than once, often unnecessarily. For instance, データの重複 (dēta no chōfuku - data duplication) or 作業の重複 (sagyou no chōfuku - overlapping tasks).
Kun'yomi (訓読み) — Native Japanese readings
The kanji 複 does not have any commonly used Kun'yomi readings on its own. It is almost exclusively used in compound words with its On'yomi, フク. While you might rarely encounter it with a native reading in older or highly specialized texts, for practical purposes in modern Japanese, learners should focus solely on its On'yomi.
Common Words & Compounds
The kanji 複 is a highly versatile component in many essential Japanese words, especially those related to complexity, multiplicity, and duplication. Mastering these compounds is key for N2 learners to expand their vocabulary.
- Words related to Complexity and Multiplicity:
- 複雑 (fukuzatsu) — complex, complicated
- 複数 (fukusū) — plural, multiple
- 複合 (fukugō) — complex, composite, combined
- 複眼 (fukugan) — compound eye (e.g., of an insect)
- 複線 (fukusen) — double track (railway); multiple story lines (in a narrative)
- 複葉機 (fukuyōki) — biplane (lit. 'multi-wing plane')
- Words related to Duplication and Repetition:
- 複製 (fukusei) — reproduction, duplication, copy
- 複写 (fukusha) — copy, duplicate (e.g., photocopy of a document)
- 重複 (chōfuku) — duplication, overlap, repetition
- 再複写 (saifukusha) — re-copy, duplicate again
- Words related to Systems and Finance:
- 複式 (fukushiki) — double-entry (bookkeeping); complex system
- 複利 (fukuri) — compound interest
- 複文 (fukubun) — complex sentence (grammar)
- 複層 (fukusō) — multi-layered, composite layer
Example Sentences
この問題は少し複雑だ。
Kono mondai wa sukoshi fukuzatsu da.
This problem is a little complex.
複数の意見が出て、議論が深まった。
Fukusū no iken ga dete, giron ga fukamatta.
Multiple opinions were expressed, which deepened the discussion.
その書類を複製して、３部ください。
Sono shorui o fukusei shite, san-bu kudasai.
Please duplicate that document and give me three copies.
現代社会は様々な要素が絡み合う複合的なシステムだ。
Gendai shakai wa samazama na yōso ga karamiau fukugōteki na shisutemu da.
Modern society is a complex system where various elements are intertwined.
彼の説明は専門用語が多く、私には複雑すぎた。
Kare no setsumei wa senmon yōgo ga ōku, watashi ni wa fukuzatsu sugita.
His explanation contained too many technical terms and was too complex for me.
この電車は複数の路線に乗り入れられるため、行先の確認が必要だ。
Kono densha wa fukusū no rosen ni noriirerareru tame, yukisaki no kakunin ga hitsuyō da.
This train can access multiple lines, so it's necessary to confirm the destination.
誤解を避けるために、情報の重複がないか確認してください。
Gokai o sakeru tame ni, jōhō no chōfuku ga nai ka kakunin shite kudasai.
To avoid misunderstandings, please confirm there is no duplication of information.
化学の実験では、複数の薬品を混合して複合体を作ることがある。
Kagaku no jikken de wa, fukusū no yakuhin o kongō shite fukugōtai o tsukuru koto ga aru.
In chemistry experiments, multiple chemicals are sometimes mixed to create compounds.
彼は新しい技術を使って、立体画像を複写した。
Kare wa atarashii gijutsu o tsukatte, rittai gazō o fukusha shita.
He used new technology to copy the 3D image.
Memory Tip
To remember 複, focus on its two main components: 衣 (clothing) on the left and 復 (to return, to repeat) on the right. Imagine trying to get dressed in a complex outfit. You might have several layers of clothing (衣) and you have to repeat (復) the action of putting on each layer. This repetitive layering makes the entire process quite complex (複).
Alternatively, picture a tailor making clothes (衣). They might need to duplicate (複) patterns or layers repeatedly (復) to create a multi-layered or intricate garment. This combination of 'clothing' and 'repetition' clearly illustrates the ideas of duplication, multiplicity, and complexity associated with 複.