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소(小): One Hanja Root, Ten Korean Words

Written and reviewed by Jun and Jin, native Korean speakers

Published · Updated · How we write & review

After this page, you can recognize the 소(小) root and guess the meaning of new words built from it.

10-second answer

The short answer

소 (so) comes from 小, meaning "small." It's the mirror image of 대(大) (dae) — wherever 대 marks something as big, 소 marks the opposite: 최소 (choeso, the minimum), 중소기업 (jungsogieop, small/medium business), 소포 (sopo, a small package, i.e. a parcel). Learning 대 and 소 as a pair is one of the highest-leverage moves in Korean vocabulary, alongside the 고/저 (go/jeo) pair.

Quick check — did that land?

  1. 1. What does 중소기업 mean?

소포! 소 means small, right?

Words Built on 소(小)

WordBreakdownMeaning
최소 (choeso)최(most) + 소(small)The minimum — 최소 금액 (minimum amount)
축소 (chukso)축(shrink) + 소(small)Reduction, shrinking — 사진 축소 (shrink a photo)
중소기업 (jungsogieop)중(medium) + 소(small) + 기업(company)Small and medium-sized enterprise — a huge category in Korean job listings
소포 (sopo)소(small) + 포(wrap)A parcel, small package — what you send at the post office
소규모 (sogyumo)소(small) + 규모(scale)Small-scale — 소규모 행사 (a small-scale event)
소도시 (sodosi)소(small) + 도시(city)A small city or town — the opposite of 대도시 (big city)
소심하다 (sosimhada)소(small) + 심(heart/mind)Timid, small-hearted, easily worried
소인 (soin)소(small) + 인(person)Child, on ticket and fare boards — 대인 (adult) / 소인 (child)
축소판 (chuksopan)축소(reduce) + 판(edition)A miniature version, scaled-down edition
소형차 (sohyeongcha)소형(small-type) + 차(car)A compact car

소심하다 isn't about size

소심하다 ("small-hearted") describes personality — timid or easily anxious — not physical smallness. The 小 root often extends into abstract "small" the way English uses "small-minded" or "petty."

See also: 대(大): One Hanja Root, Ten Korean Words

소 vs 대 — The Same Pair, Flipped

소 (small)대 (big)Where you'll see it
최소 (minimum)최대 (maximum)Settings, specifications, requirements
축소 (shrink)확대 (enlarge)Photo editing, printing, document scaling
중소기업 (small/medium company)대기업 (big company/conglomerate)Job listings, business news
소형차 (compact car)대형차 (large car)Car rental sites, dealership listings

See 대(大) for the big side of the pair. Job postings, rental car sites, and printer settings all lean on this exact 소/대 contrast — once it's automatic, those menus stop being a wall of syllables.

Quick Examples

우체국에서 소포를 보냈어요.

ucheguk-eseo soporeul bonaesseoyo.

I sent a package at the post office.

소포 — the standard word for a mailed parcel, not a letter (편지).

저는 중소기업에서 일해요.

jeoneun jungsogieop-eseo ilhaeyo.

I work at a small/medium-sized company.

중소기업 vs 대기업 — a very common distinction in Korean job culture and news.

이 파일 크기를 좀 축소할 수 있어요?

i pail keugireul jom chuksohal su isseoyo?

Can you shrink this file size a bit?

축소하다 — the direct opposite of 확대하다 (enlarge).

Common Mistakes

Mistake #1 — Confusing 소포 with 편지

소포 is a package/parcel; 편지 is a letter. Post office staff will ask which one you're sending.

Mistake #2 — Taking 소심하다 literally

It describes a timid personality, not a literally small heart — don't read every 소-word as physical size.

Mini Quiz

2 short questions — about 1 minute

  1. 2. What is 소포?

  2. 3. Which word is the opposite of 확대 (enlarge)?

Part of Korean Hanja Roots: One Character, Ten Words

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