Why was "tantrum" trending last week?
1809, from French pyrétique or directly from Modern Latin pyreticus, from Greek pyretos "fever, burning heat," related to pyr "fire" (see fire (n.)). As a noun, "a pyretic agent," from 1728.
pyretic py·ret·ic (pī-rět'ĭk)adj. Relating to, producing, or affected by fever.