Guru

Guru is a poorna sadguru (and in human form guru is an enlightened/self-realized person) who is the advaitaanubhavam (the anubhavam (experience) where there is no second) itself. I bow to his feet. He is nirguna chaitanyam (laking gunas [characteristics] pure consciousness). He is vyaktha avyaktham (the expressed and the unexpressed i.e., vyaktam (expressed) as the anu roopa (anu is the smallest possible material [particulate matter] which is the building block of any structure and roopam is appearance/shape) universe and avyaktham (unexpressed) as the akasam [space] (akasam is one which gives avakasam [one which allows] Allows what? the expressed). He is shishya himself.

Gurudeva Pahimam Gurdeva Rakshamam

"Nityaanandam paramasukhadam kevalam gyanamurthim
Dwandwatheetam gaganasadrusam tatvamasyadi laksyam
Ekam Nityam vimalamachalam sarvadhisaakshibhutam
Bhavaatheetam trigunarahitam sadgurum tvam namami "

"Mouna vyakhya prakatitha parabrahma tatvam ..........." - Guru Dakshinamurthy slokam.

"Manogyana saakshi moolam
sadaa swayam saakshi roopam
kevala swami nirguna chaitanya sadgurum tvam namamyaham "

The meaning of the above slokas go something like this (this is not an exact translation but gist of the meaning):

first sloka: "Nityaanandam ... " It means I bow to the feet of the sadguru (enlightened master) who is eternal bliss (nityaanadam), highest comfort (paramasukhadam), one (kevalam), knowledge/awareness/consciousness in a form (gyanamurthim), beyond duality (dwandwaathetham), similar to sky (gaganasadrusam), the aim of the sentence thou art that (tatvamasyadhi lakshyam), unity as in one (ekam), eternal (nityam), pure(vimalam), immovable (does not move) [achalam], always the observer (sarvadhi saakhshi bhutam), beyond thoughts (bhavatheetham), lacking the three gunas (triguna rahitam; the three gunas are saatvikam, rajas, tamas).

second line: "mouna .... " is the first line of the Guru Dakshinamurthy stotram. The meaning of this line is "By silence is expressed the nature of the Parabrahmam/Brahmam/One's swaswaroopam.