This is the 14960th most frequent Korean word.
반지다
"반지다" means "slippery" or "smooth."
Here, '반지다' describes the shiny or reflective quality of the room.
이 방은 반지해 보인다.
This room appears shiny.
In this context, '반지다' refers to the shoes being cleaned to a shiny state.
구두가 반지게 닦였어.
The shoes were polished to a shine.
Here, '반지다' metaphorically conveys smoothness and an appealing quality about his smile.