Middle English.
Avatar is a Sanskrit word that literally means "an alternative form of". It is also commonly used in Indian epics like the Ramayana, Mahabharata, Vedas, Upanishads, etc; to refer to the forms taken...
Guru derives from the Sanskrit guruh, heavy, hence venerable.
"Calligraphy" refers to the art of producing beautiful handwriting, or to the handwriting itself. It is from Greek words meaning "beautiful writing."
jezik, govor, besjeda. If you're asking what is the word word in Croatian it'd be rijec