Derisive means showing open scorn. A derisive laugh, derisive comments, derisive of the whole plan.
It describes the scorn itself, so a derisive cheer is a mocking one. Keep it apart from derisory, which describes a thing so small that it deserves scorn, as in a derisory pay offer.
1adjectivederisiveShowing open scorn.
“A derisive cheer went up when the minister sat down.”
derisive is a quality.
Latin deridere means to laugh at, from de plus ridere, to laugh.
Latin
dērīdeō — to deride
English, today
derisive
From the participle stem of Latin dērīdeō (“to deride”) + -ive.
Etymology from Wiktionary, CC BY-SA