크다
keuda
to be big / large (physical size)
많다
manhada
to be many / much (quantity)
크다 vs 많다: Physical Size vs Quantity in Korean
크다 describes something as physically large in size, shape, or scale, while 많다 describes a large number or amount of something and is never used for physical dimensions.
Side-by-Side Comparison
| 크다 (keuda) | 많다 (manhada) | |
|---|---|---|
| What It Describes | Physical size, scale, dimensions | Number or quantity of things |
| Opposite | 작다 (jakda — to be small) | 적다 (jeokda — to be few/little) |
| Used With | Countable and uncountable nouns referring to size | Countable and uncountable quantities of items |
| Example Noun Pairs | 방이 크다 (the room is big), 키가 크다 (tall in height) | 사람이 많다 (there are many people), 돈이 많다 (lots of money) |
| Adverbial Form | 크게 (keuge — greatly, in a big way) | 많이 (mani — a lot, much) |
Examples in Context
Describing a large apartment — using 크다
이 아파트는 정말 커요.
This apartment is really big.
Saying someone is tall — using 크다
우리 오빠는 키가 커요.
My older brother is tall.
Commenting on a large crowd at an event — using 많다
오늘 사람이 많네요.
There are a lot of people today.
Saying someone has a lot of work — using 많다
요즘 할 일이 많아요.
There's a lot to do these days.
Common Mistakes to Avoid
- ✗Saying 사람이 커요 to mean 'there are many people' — 크다 refers to size, not count. Use 많다 for quantities.
- ✗Using 많다 for size — 방이 많아요 means 'there are many rooms,' not 'the room is big.' For size, use 크다.
- ✗Forgetting the adverbial forms: 크게 means 'greatly/in a big way' and 많이 means 'a lot' — these are very common in everyday Korean and worth memorizing separately.
Frequently Asked Questions
How do I say 'a big amount of money' in Korean?
Use 많다 for quantity: 돈이 많아요 (I have a lot of money). Use 크다 only for physical size — 크다 is not used for amounts of money.
Can 크다 refer to non-physical things?
Yes — 크다 can describe abstract scope or significance (영향이 크다 — the impact is great), but for countable quantities, always use 많다.
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