Define me

Pablo unhitched the carabao from the empty sled.

What does the word unhitched means?

A bundle of fresh green zacate lay under the tree and the carabao began to feed upon it hungrily.

What does the word Zacate means?

"Eat," he said in a thin, wheezy voice. What does the word wheezy mean?

He filed his mouth with them and walked on to Osiang's hut, munching the sourish leaves.

What does the word "munching" mean?

I am boiling a pinchful of bran. What does the word "bran" mean?ou