Guffaw (noun)

1. A loud, unrestrained burst of laughter.
2. A hearty, boisterous laugh.

Origin:

From guffaw, onomatopoeic, first attested in the early 19th century.

Examples:

1. His joke was so funny, it elicited a guffaw from the audience.
2. The room was filled with guffaws of laughter.
3. She let out a guffaw at the absurdity of the situation.
4. The comedian's punchline was met with a room full of guffaws.
5. He couldn't help but let out a guffaw at the silly pun.