expression, ichidan verb
hunch one's shoulders; arch one's back
Describes a posture where the back is rounded, often from cold, tiredness, or a defensive stance. Can be used literally or figuratively.
寒くて、思わず背中を丸めて歩いた。
It was so cold that I walked with my back hunched without thinking.
彼は叱られて、背中を
He was scolded and hunched his shoulders, making himself small.