Upanishad
Concise Oxford English Dictionary © 2008 Oxford University Press:
Upanishad /uːˈpanɪʃad/
▶noun each of a series of Hindu sacred treatises written in Sanskrit and expounding the Vedas.
– origin from Sanskrit, lit. ‘sitting near (i.e. at the feet of a master)’, from upa ‘near’ + ni-ṣad ‘sit down’.
'Upanishad' also found in these Oxford entries:

