What is (으)로?
(으)로 is a versatile Korean particle that attaches to nouns. It's an adverbial case particle (부사격 조사), meaning it turns the noun it's attached to into an adverbial phrase that modifies the predicate (verb/adjective). It has many meanings, including direction, means, tools, status, and cause.
Attachment Rules
The form you use depends on the final sound of the noun preceding it.
Noun Ends In... · Add... · Example (Noun) · Result
A vowel · 로 · 버스 · 버스로
The consonant ㄹ · 로 · 서울 · 서울로
Any other consonant · 으로 · 집 · 집으로
Use 1: Direction
One of the most common uses of (으)로 is to indicate the direction of movement, similar to 'to' or 'towards' in English. It is frequently used with movement verbs like 가다 (to go), 오다 (to come), and 다니다 (to attend/commute).
오른쪽으로 가세요.
Please go to the right.
학생들이 교실로 들어가요.
The students are going into the classroom.
저는 지금 집으로 가고 있어요.
I'm going home right now.
Nuance: (으)로 vs. 에
Both particles can mark a destination, but there's a subtle difference. 에 typically marks a specific, static point or destination. (으)로 emphasizes the general direction of travel towards that destination. For many movement verbs, they are interchangeable, but (으)로 feels more like 'headed towards' while 에 is 'arriving at'.
Use 2: Means and Tools
(으)로 is also used to indicate the tool, method, or means by which an action is performed. This corresponds to 'by', 'with', or 'using' in English.
Common Categories
Transportation: How you travel.
Tools: What you use to do something.
Languages: The language you use to communicate.
Materials: What something is made of.
Payment Methods: How you pay for something.