The Sanskrit word "?iva" (Devanagari: ???, transliterated as Shiva or Siva) means, states Monier Monier-Williams, "auspicious, propitious, gracious, benign, kind, benevolent, friendly". The roots of ?iva in folk etymology are ?? which means "in whom all things lie, pervasiveness" and va which means "embodiment of grace".

The word Shiva is used as an adjective in the Rig Veda (approximately 1700–1100 BC), as an epithet for several Rigvedic deities, including Rudra. The term Shiva also connotes "liberation, final emancipation" and "the auspicious one", this adjective sense of usage is addressed to many deities in Vedic layers of literature. The term evolved from the Vedic Rudra-Shiva to the noun Shiva in the Epics and the Puranas, as an auspicious deity who is the "creator, reproducer and dissolver".

Sharma presents another etymology with the Sanskrit root ?arv-, which means "to injure" or "to kill", interprets the name to connote "one who can kill the forces of darkness".

The Sanskrit word ?aiva means "relating to the god Shiva", and this term is the Sanskrit name both for one of the principal sects of Hinduism and for a member of that sect. It is used as an adjective to characterize certain beliefs and practices, such as Shaivism.

Some authors associate the name with the Tamil word ?ivappu meaning "red", noting that Shiva is linked to the Sun (?ivan, "the Red one", in Tamil) and that Rudra is also called Babhru (brown, or red) in the Rigveda. The Vishnu sahasranama interprets Shiva to have multiple meanings: "The Pure One", and "the One who is not affected by three Gu?as of Prak?ti (Sattva, Rajas, and Tamas)".

Shiva is known by many names such as Viswanatha (lord of the universe), Mahadeva, Mahandeo, Mahasu, Mahesha, Maheshvara, Shankara, Shambhu, Rudra, Hara, Trilochana, Devendra (chief of the gods), Neelakanta, Subhankara, Trilokinatha (lord of the three realms), and Ghrneshwar (lord of compassion). The highest reverence for Shiva in Shaivism is reflected in his epithets Mah?deva ("Great god"; mah? "Great" and deva "god"), Mahe?vara ("Great Lord"; mah? "great" and ??vara "lord"), and Parame?vara ("Supreme Lord").

Sahasranama are medieval Indian texts that list a thousand names derived from aspects and epithets of a deity. There are at least eight different versions of the Shiva Sahasranama, devotional hymns (stotras) listing many names of Shiva. The version appearing in Book 13 (Anu??sanaparvan) of the Mahabharata provides one such list. Shiva also has Dasha-Sahasranamas (10,000 names) that are found in the Mahanyasa. The Shri Rudram Chamakam, also known as the ?atarudriya, is a devotional hymn to Shiva hailing him by many names.

The Shiva-related tradition is a major part of Hinduism, found all over India, Nepal, Sri Lanka, and Bali (Indonesia). Scholars have interpreted early prehistoric paintings at the Bhimbetka rock shelters, carbon dated to be from pre-10,000 BCE period, as Shiva dancing, Shiva's trident, and his mount Nandi. Rock paintings from Bhimbetka, depicting a figure with a trishul, have been described as Nataraja by Erwin Neumayer, who dates them to the mesolithic.

Indus Valley origins

Of several Indus valley seals that show animals, one seal that has attracted attention shows a large central figure, either horned or wearing a horned headdress and possibly ithyphallic, seated in a posture reminiscent of the Lotus position, surrounded by animals. This figure was named by early excavators of Mohenjo-daro as Pashupati (Lord of Animals, Sanskrit pa?upati), an epithet of the later Hindu deities Shiva and Rudra.

Sir John Marshall and others suggested that this figure is a prototype of Shiva, with three faces, seated in a "yoga posture" with the knees out and feet joined. Semi-circular shapes on the head were interpreted as two horns. Scholars such as Gavin Flood, John Keay and Doris Meth Srinivasan have expressed doubts about this suggestion.

Gavin Flood states that it is not clear from the seal that the figure has three faces, is seated in a yoga posture, or even that the shape is intended to represent a human figure. He characterizes these views as "speculative", but adds that it is nevertheless possible that there are echoes of Shaiva iconographic themes, such as half-moon shapes resembling the horns of a bull. John Keay writes that "he may indeed be an early manifestation of Lord Shiva as Pashu-pati", but a couple of his specialties of this figure does not match with Rudra. Writing in 1997, Srinivasan interprets what John Marshall interpreted as facial as not human but more bovine, possibly a divine buffalo-man.

The interpretation of the seal continues to be disputed. McEvilley, for example, states that it is not possible to "account for this posture outside the yogic account". Asko Parpola states that other archaeological finds such as the early Elamite seals dated to 3000-2750 BCE show similar figures and t