-으로

• 로 (-ro) – after vowels and ㄹ (l)
• ㄹ로 (-llo) – after vowels, colloquially for certain pronouns

From Middle Korean -으〮로〮 (Yale: -úlwó), from Old Korean 乙留 (*-ulwo).

• (SK Standard/Seoul) IPA^(key): [ɯɾo̞]
• Phonetic hangul: [으로]

으로 • (-euro)

1. to, toward: directional case marker, in a physical sense

   나무 방향으로 가자. ― Namu banghyang-'euro ga-ja. ― Let's go toward the direction of the tree.

   집으로 가다가 노숙자를 만났다.

   Jib-euro gadaga nosukja-reul mannatda.

   I met a homeless person while going home [lit. going towards home].

2. into, direction of a change: directional case marker in a metaphorical sense; expresses transformation or direction towards a certain time

   사람이 호랑이로 변했다. ― Saram-i horang'i-ro byeonhaetda. ― The person turned into a tiger.

   나무를 풀로 바꾸자. ― Namu-reul pul-lo bakkuja. ― Let's switch out the trees for grass.

   올해로 한국어를 배운 지 3년이 됐다. ― Olhaero hangugeo-reul bae'un ji 3nyeon-i dwaetda. ― This year it's been 3 years since I've started learning Korean.

3. using, out of; with: instrumental case marker, marking material, instruments, or means of doing something

   종이로 옷을 만들어봤다. ― Jong'i-ro os-eul mandeureo-bwatda. ― I tried making clothes out of paper.

   칼로 돌을 깎았다. ― Kal-lo dor-eul kkakkatda. ― I carved the stone with a knife.

   오랑캐로 오랑캐를 제어한다. ― Orangkae-ro orangkae-reul jeeohanda. ― One controls barbarians using [other] barbarians.

   뒷문으로 둘어와. ― Dwinmuneuro dureowa. ― Come in through the back door.

4. due to; from: instrumental case marker, marking causation

   독감으로 돌아가셨다. ― Dokgam-euro doragasyeotda. ― He passed away from influenza.

   로또로 부자 됐어. ― Rotto-ro buja dwaesseo. ― I got rich from the lottery.

5. as; as being; in the state of: instrumental case marker, marking state, manner, status, or capacity

   몇 년 간 거지로 살았다. ― Myeot nyeon gan geoji-ro saratda. ― I lived as a beggar for several years.

   좋은 친구로 생각한다. ― Jo-eun chingu-ro saenggak-handa. ― I consider her as being a good friend.

   긍정적으로 생각을 해야 돼. ― Geungjeongjeogeuro saenggag-eul haeya dwae. ― You have to think positively.

6. as of: instrumental case marker, marking an update in a list of previous events

   오늘 부로 너는 지각을 다섯 번 했어.

   Oneul bu-ro neo-neun jigag-eul daseot beon haesseo.

   As of today, you've been late five times.

7. Used in various expressions:
   1. See 으로 하여 (-euro hayeo, “because of; via”).
   2. See 으로 하여금 (-euro hayeogeum, expresses the agent in a causative construction).
   3. See 으로 더불어 (-euro deobureo, “together with”).

• Usually in the first sense, 으로 (-euro) is more indirect as it expresses going towards a certain direction or a certain location. 에 (-e) on the other hand, expresses a direct location, which is similar to 를 (-reul).
  • In this directional sense, only 으로 (-euro) can be used with expressions ending with 쪽 (jjok). Using 에 (-e) in such case would result in a locative sense.

• 으로서 (-euroseo)
• 으로써 (-eurosseo)
• 으로부터 (-eurobuteo)