This is the 12987th most frequent Korean word.
돌아오면
"돌아오면" means "if/when (someone) returns" in English.
The word 돌아오면 expresses a conditional setting: 'if coming back', combining 돌아오다 ('to return') and 면 ('if').
친구가 여행에서 돌아오면 큰 파티를 열 거예요.
If my friend comes back from the trip, we will throw a big party.
Here, 돌아오면 establishes a time-based condition for an action ('to call').
돌아오면 나에게 전화해 주세요.
Please call me when you return.
In this sentence, 돌아오면 is used to indicate a temporal condition for the subsequent initiation ('to start').