Burro (noun)

1. A small donkey, especially one used as a pack animal in the southwestern United States and Mexico.
2. A term used to describe a small, unimportant and unattractive person.

Origin:

From spanish burro, from latin burrus meaning "reddish, chestnut-colored".

Examples:

1. The burro was loaded with packs of supplies for the trip into the mountains.
2. He was called a burro by his classmates for his small size and unattractive looks.
3. The burro plodded along the trail, carrying its heavy load.
4. The burro is a hardy animal and can survive in arid conditions.
5. He was often teased as a burro, but he didn't let that get to him.