圈 (juàn): vỏ bọc gia súc

Grandpa every morning drives the flock of sheep into the pen, and then feeds them hay.

The farmer built a spacious new pigpen, giving the pigs more room to move around.

Winter has come, and the herders keep the livestock in the pen to prevent them from frostbite.

That pen is in disrepair after years of neglect; the fence is broken, and the cattle can easily run out.