The Sri Rudram Namakam is the first part of the larger Sri Rudram hymn, found in the Krishna Yajurveda, specifically in the Taittiriya Samhita (4.5.1–11). It consists of eleven anuvakas (sections) that each contain a series of names and epithets of Rudra, a fierce and compassionate form of Shiva. The Namakam is so called because each verse begins with 'namaḥ' (salutation), as in 'namaste rudra manyava' (Rigveda 10.90 is a related hymn, but the Namakam itself is from the Yajurveda). The hymn is also known as the Shatarudriya, referencing the hundred or more names of Rudra it contains.
Each anuvaka invokes Rudra in various aspects—as lord of cattle, of mountains, of waters, of forests, and as the healer and destroyer of diseases. The beej-akshara (seed syllable) 'namah' is central, representing surrender and reverence. The phonetics of the chant, with its rolling 'r' and aspirated consonants, are said to resonate with the subtle energy channels (nadis) and purify the chanter. According to the Rudra Upanishad, chanting the Namakam bestows liberation and removes sins.
Traditional purposes include purification of the environment, healing of physical and mental ailments, protection from negative forces, and invoking Rudra's grace for transformation. The recommended chanting context is during Rudra Abhishekam (ritual bathing of the Shiva linga) with milk, water, and bilva leaves, ideally on Mondays, Pradosham, or Maha Shivaratri. The count is often 11, 108, or 1008 repetitions. Cautions include maintaining purity of body and mind, as the hymn is considered powerful; it should not be chanted casually or without proper intention.
The Namakam is also used in Vedic rituals for pacifying planetary afflictions and for general well-being.
Salutations to your fury, O Rudra, and to your arrow. Salutations to your bow, and to your arms.
The mantra does not contain explicit seed syllables (bījākṣaras) like hrīṃ or klīṃ; instead, the repeated 'namaḥ' functions as a seed of surrender and reverence, and the rolling 'r' in 'rudra' and 'manyava' is considered to activate subtle energy.