hunker|hunkered|hunkering

期末考试前，我们决定专心复习功课。

Before the final exams, we decided to ___hunker down and focus on studying.

他蹲下来系鞋带。

He ___hunkered down to tie his shoelaces.

暴风雪来临时，我们在小木屋里躲避。

When the blizzard hit, we were ___hunkering in the cabin.