Shri Rudra

Rudra it's a name of Shiva. There are several meanings to the word Rudra.
“Rtam (dam) Samsaara dukham draava yat iti Rudrah”.He destroys the sorrows of the world i.e. (Rudra).
“Rodati Sarvamantakala”. The one who makes one to suffer.
“Rtou Naadaante dravati – draavayateeti Rudrah". The end note of the musical sound i.e. (Rudra).
“Rtya – Vedarupaya, dharmadinava-loka yati praayateeti vaa Rudrah”. In the form of Veda Dharma is promoted i.e. (Rudra).
“Rtya-vaagrupaya, vaakyam, prapayateeti Rudrah”. In the form of Speech, brings out the importance of the meaning of words i.e. (Rudra).
Rtya-Pranava rupaya svatmanam prayateeti Rudrah”. In the name of pranava (OM) He makes one to realize him.
“Rudroroutiti satye rorupamaano dravati pravashati martyaaniti Rudrah”. In the form truth he enters humans.
“Rtam Sabdam Vedaatmaanam Brahmane dadati Kalpaadaaviti Rudrah”. Rudra presented Vedas to Brahma at the Commencement of kalpa. Rudras also means the persons created by Rudra as Sadrusha.
Rtim Raati is responsible for the sound. He is praana Svarupa. Granter of praana (life).

Rudram is i.e. light Teja and Ruth who binds and attracts. Rudram is fire itself. He has tow forms one terrible and the other auspicious i.e. reflected in this Brahmana.
“Taam bhakte draavayati". He is even capable of driving away hat Shakti (energy).

From Rudra Hridaya Upanishad:

...There do not shine the bodies of the sun, moon or the stars. There does not blow the wind, there do not exist many Devatas. He, the One Lord only exists. He only, the Purity of purities, shines for ever and ever.
There are two birds in this body, the Jiva and the Paramatman. The Jiva eats the fruit of his Karmas, but the Paramatman is untouched by anything. The Paramatman is only the Sakshi. He does not do anything. He only assumes the form of the Jiva through His Maya, just as the Akasa inside a pot seems to be different from the Akasa outside and assumes the form of the pot. In reality all is Siva, Advaita, the One Absolute. There is no difference of whatever kind.
When all is understood to be One, Omkara, the Absolute, there is no sorrow, there is no Maya. Then the attainment of the Advaita-Paramananda is very easy. Think that you are the basis of all this universe, you are the One, Kevala, Sat-Chit-Ghana. All people cannot understand this Truth. Those devoid of Maya can know this secret. After knowing this, the Atman does not move towards any place at any time. It becomes one with the Absolute, just like Ghatakasa with Paramakasa. Just as Akasa does not move anywhere, similarly this Atman does not have any movement. It becomes one with OM.
One who knows this great secret Truth is the real Muni. He becomes the Para-Brahman Itself. He becomes Satchidananda. He attains permanent peace.
Om ! May He protect us both together; may He nourish us both together;
May we work conjointly with great energy,
May our study be vigorous and effective;
May we not mutually dispute (or may we not hate any).
Om ! Let there be Peace in me !
Let there be Peace in my environment !
Let there be Peace in the forces that act on me !

||Om Tat Purushaya Vidhmahe
Mahadevaya Dheemahe
Thanno Rudra Prachodayath.||

Sri Rudram: