Nirṛti निरृति is the goddess of deathly hidden realms and sorrows, one of the dikpāla (Guardians of the directions), representing the southwest (or—according to Monier-Williams’s Sanskrit-English Dictionary—the south). The name nirhti has the meaning of "absence of ṛta, lawless". The masculine form of the name, Nirhita, is a name of Adharma.
Nirrti is a Ketu ruled nakshatra in vedic astrology, strongly associated with Kali in form Dhumavati. Nirṛti is mentioned in a few hymns of the Rigveda, mostly to seek protection from her or imploring for her departure. In one hymn (X.59), she is mentioned several times. This hymn, after summing up her nature, also asks for her departure from the sacrificial site. In the Atharva Veda (V.7.9), she is described as having golden locks. In the Taittiriya Brahmana (I.6.1.4), Nirṛti is described as dark, dressed in dark clothes and her sacrificial shares are dark husks. In the Shatapatha Brahmana (X.1.2.9), she is associated with pain and as the southwest quarter is her region, pain is associated with the southwest. But elsewhere in the same text (V.2.3.3.) she is mentioned as living in the south, the direction of the kingdom of the dead.
Meditative mantra or Dhyana
" Alakshmim krishnavarnamcha krodhanam kalahapriyam,
Krishnavastram paridhanam lauhavaranabhushitam.
Vagnasanasham dwibhujam sharkaraghrishtachandanam,
samarjanisabyastahastam dakshina hastasurpakam.
Tailavyangitagatramcha gardhavaroham bhaje."
Goddess has dark black complexion. Similar to Devi Kali. Nirrhiti is also similar to Mahavidyas, Dhumavati. She is also named Alakshmi, she wears black dress and iron ornaments. She uses a large crow as her vehicle. She holds scimitar.
In puranic story Nirrhiti is known as Alakshmi. When the ocean was churned to get ambrosia, the venom kalkuta released from that a goddess was born known as Nirrhiti . After that goddess Lakshmi, the goddess of wealth. So Nirrhiti is considered as elder sister of Lakshmi. Lakshmi presides on wealth, and Nirriti presides on sorrows that is why she is called Alakshmi.
Her name's correct original pronunciation is three syllables with all vowels short: "Ni-rṛ-ti"; the first 'r' is a consonant, and the second 'r' is a vowel as in "grrr". (In the Stargate series the 'irr' in her name is pronounced like American English "ear" in "fear".) A common modern Indian pronunciation is "Nir-ri-ti".
In popular culture
In the video game Ninja Gaiden 2, the dual-wielded swords have a technique called Blade of Nirrti.
In Roger Zelazny's novel Lord of Light, set on a world where humans with vastly advanced technology have set themselves up as the gods of Hinduism, Nirriti the Black is one of their enemies. In that work, Nirrti is male, and actually a Christian clergyman.
In the TV series Stargate SG-1, Nirrti is a Goa'uld System Lord who has taken on the persona of the Hindu goddess in order to enslave the populations of some planets and force them to worship her. She experimented on humans in order to create and exploit advanced humans, which she continued to do up until she was killed by one of the subjects of her experiments.