Question

바닥에 침을 뱉지 마시오 As a particle of movement, -에 is used to mark a certain place where something is being put in/on, added/written to, etc. In this meaning, -에 may sometimes occur replaced by -에다(가) in colloquial speech.

Accepted Answer

Do not spit on the floor

Front	바닥에 침을 뱉지 마시오
Back	Do not spit on the floor
Notes	As a particle of movement, -에 is used to mark a certain place where something is being put in/on, added/written to, etc. In this meaning, -에 may sometimes occur replaced by -에다(가) in colloquial speech.

에 바닥에 침을 뱉지 마시오 Spit Floor Particle