The hippopotamus yawned widely.

Meaning: The hippopotamus opened its mouth very wide and took a deep breath.

Choice of Words: Hippopotamus is a large animal that lives in water. Yawned means to open your mouth wide and take a deep breath. Widely means to a great extent or degree.

Alternative Expressions

The river horse stretched its jaws.

Meaning: This sentence means that the hippopotamus opened its mouth very wide, probably because it was tired or bored.

Choice of Words: River horse is another name for a hippopotamus. Stretched means to make something longer or wider. Jaws are the bones in your mouth that you use to chew food.

The giant water pig opened its gape.

Meaning: This sentence means that the hippopotamus opened its mouth very wide, probably because it was tired or bored.

Choice of Words: Giant water pig is another name for a hippopotamus. Opened means to make something wider or bigger. Gape means a wide opening, especially in the mouth.

Related Expressions