absurd

/æbˈzɝd/adjective

Completely senseless or laughably unreasonable.

Example sentence

“It would be absurd to wear a winter coat on such a hot day.”

Stronger than "silly". Saying "that's absurd" flatly rejects an idea as making no sense at all, so it can sound dismissive.

Related words

abundantExisting in very large amounts; more than enough.abroadIn or to a country other than one's own.accentuateTo draw attention to something and make it stand out clearly.abrasiveHarsh and unpleasant in the way one treats or speaks to others.acclaimTo cry out or shout, especially in welcome or enthusiastic approval.abhorTo feel intense hatred or disgust toward something.