This is the 3351st most frequent Korean word.
넘으면
"넘으면" means "if (it) crosses" or "if (it) exceeds."
In this sentence, '넘으면' means 'if someone goes over or crosses'. It implies the conditional action of crossing or surpassing the mountain.
산을 넘으면 마을이 나옵니다.
If you cross over the mountain, a village appears.
Here, '넘으면' indicates 'if it surpasses'. It refers to exceeding a certain limit of time.
시간이 넘으면 추가 요금이 부과됩니다.
If the time exceeds, an additional fee will be charged.
In this context, '넘으면' is used to suggest the condition of exceeding a limit, specifically the temperature limit.