Namaste "is a common spoken greeting or salutation from the Indian subcontinent." Certainly I never heard it until associating it with yoga practice. The most common explanation I've encountered is "I acknowledge the spirit in you which is in me," though there are probably many variations. Wikipedia goes on to provide interesting etymology. Namas, Sanskrit for bow, adoration, and te, the dative of you (second person singular. I have forgotten most of the grammar I've learned at one time or another.)
Even last night, as I walked from my car with my hands full, an Indian couple passed by, dressed in traditional clothing. They were singing. I can't remember what it sounded like, the elderly man's voice was rather resonant. They stopped singing as they passed and I stood aside to let them go by. Then they both gave the Namaste sign, bowing with cupped hands. I was too lazy to put down my encumbrances, so I nodded curtly. But there it was, they had acknowledged what is in all of us.
Then this morning in the car, I couldn't tell you what I was thinking about, maybe my neglected yoga and meditation practices, but I may have been thinking of anagrams, can't imagine why. And the word Namaste came into my thought. And I suddenly realized: my last name, Eastman, is an anagram of Namaste.
(Maybe I'll sign all my correspondence Namaste and see if anyone catches on.)
Namaste: I acknowledge the spirit in both of us.