see shivah (Jewish ritual of mourning) or Siva (Hindu god of destruction and reproduction), depending which is meant.
Entries linking to shiva
shivah n.
seven-day mourning period in Jewish religious custom, 1892, from Hebrew shibhah "seven," short for shibh'ath yeme ha'ebhel "the seven days of mourning" for the dead.
Siva n.
also Shiva, one of the three supreme gods of Hinduism, lord of destruction and reproduction, 1788, from Hindi Shiva, from Sanskrit Sivah, literally "propitious, gracious" (a euphemism), from PIE *ki-wo-, suffixed form of root *kei- (1) "to lie," also forming words for "bed, couch," and with a secondary sense of "beloved, dear." But by some this name is said to be a euphemism. Related: Sivaism; Sivaistic.