Select the most appropriate antonym of the given word.

SHALLOW

deep

The most appropriate antonym of the word shallow is deep.

• Shallow means "not having much depth or substance."
• Deep means "having much depth or substance."

The other words do not have the same meaning as shallow, so they are not its antonyms.

• Hollow means "having a hole or empty space inside."
• Trivial means "of little importance or value."
• Narrow means "having a small width in proportion to the length."