This is the 11102nd most frequent Russian word.
голыми
"голыми" means "naked" or "bare" in English (instrumental plural of "голый").
In this sentence, "голыми" describes the state of being without clothing, used in its plural instrumental form to match the subject.
Они ходили по пляжу голыми.
They walked on the beach naked.
Here, "голыми" means 'bare' or 'without protection,' used in its plural instrumental form to describe 'hands'.
Мы построили шалаш голыми руками.
We built a hut with bare hands.
In this sentence, "голыми" refers to 'bare' or 'leafless,' applied to describe 'branches' in its plural instrumental form.