The word "giggle" refers to a light, silly, and often uncontrollable laugh, typically associated with amusement or nervousness. It is a sound that expresses joy, playfulness, or excitement, and is often characterized by a high-pitched tone.
The word "giggle" comes from the early 19th century, originating from the word "giglet," which meant a girl or a young woman (a term derived from the 16th-century term "giggle" or "gigglet"). The word reflects the playful, mischievous quality of laughter.