risible
laughable; absurd
Roots
- -able / -ible: able to be, fit to be, or worthy of
- rid / ris: laugh or mock
Other words with the rid / ris root
- deride: to mock or ridicule
- derision: contemptuous mockery
- derisive: mocking or scornful
- ridicule: mockery; to mock
- ridiculous: absurd or laughable
Risible is laugh-able: an idea so absurd it practically invites laughter.
The excuse was so risible that even his friends stopped defending it.