chuckles

Example:She couldn't help but giggle when she heard the joke.

Definition:A short laugh or a series of short laughs, often produced by light or playful amusement.

Example:The audience began to titter at the humorless joke.

Definition:A soft, subdued laugh, often stifled or unconvincing.

Example:He chortled to himself as he read his own praise.

Definition:To laugh in a pleased or self-satisfied way, typically with interruptions to catch one's breath.