cachinnate
Definitions
from The Century Dictionary and Cyclopedia
- verb To indulge in loud, continued laughter; to laugh immoderately.
Examples
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They reach at once and directly the instinctive sense of the ludicrous, and over them youth and age cachinnate together.
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Every time you take a full breath, or when you cachinnate well, the diaphragm descends and gives the stomach an extra squeeze and shakes it.
Note
This word comes from the Latin 'cacchino,' laugh aloud, which is imitative in origin.