This is the 397th most frequent Korean word.
등에서
"On the back" or "from the back."
In this sentence, '등에서' indicates the specific location (the back) where the action (sweating) is occurring.
등에서 땀이 나기 시작했어요.
Sweat started to form on my back.
In this case, '등에서' signifies the source origin (the back) from which the luggage is being removed.
캠핑 갈 때 등에서 짐을 내려놓았어요.
When we went camping, I put down the luggage from my back.
Here, '등에서' denotes 'in the aspects of ranking or classification,' specifying the context of his achievements.