Namasté

Namasté is a common spoken greeting or salutation in the Indian subcontinent. Namaskar is considered a slightly more formal version than Namaste but both express deep respect. It is commonly used in India and Nepal by Hindus, Sikhs, Jains and Buddhists, and many continue to use this outside the Indian subcontinent. In Indian and Nepali culture, the word is spoken at the beginning of written or verbal communication. However, the same hands folded gesture is made wordlessly upon departure. In yoga, namaste is said to mean " I am your humble servant" which you say to your instructor.
Taken literally, it means "I bow to you". The word is derived from Sanskrit (namas): to bow, obeisance, reverential salutation, and (te): "to you".
When spoken to another person, it is commonly accompanied by a slight bow made with hands pressed together, palms touching and fingers pointed upwards, in front of the chest. The gesture can also be performed wordlessly and carry the same meaning.