This is the 10018th most frequent Korean word.
공유기
Wi-Fi router.
In this sentence, '공유기' refers to the router as a central device for maintaining network stability.
공유기가 고장나서 인터넷 연결이 불안정해요.
The router broke, so the internet connection is unstable.
Here, '공유기' is used to indicate a device considered for replacement to meet functional requirements.
새로운 공유기를 사야 할 것 같아요.
I think we need to buy a new router.
Here, '공유기' is used to denote a device that enables wireless internet sharing.