This is the 7660th most frequent Korean word.
펴고
"펴고" means "unfolding" or "spreading out."
Here, "펴고" means 'to open' in the context of opening a book or something similar.
책을 펴고 공부를 시작했어요.
I opened the book and started studying.
In this sentence, "펴고" translates to 'to spread out,' describing the action of spreading out a mat.
날씨가 좋아서 돗자리를 펴고 피크닉을 했어요.
Since the weather was nice, I spread out a mat and had a picnic.
Here, "펴고" is used to mean 'to stretch' in terms of body movement, like stretching one's arms.