Which word is an antonym of “snigger”?

Correct answer: Laugh openly. To snigger is to laugh in a stifled, often mocking way, so “laugh openly” is its opposite.

• Giggle: Giggle is a similar, light and suppressed laugh.
• Smile: Smile is a quiet expression and not the opposite of a stifled laugh.
• None of these: “None of these” is incorrect because “laugh openly” is an antonym.