Clavia
From The Stargate Omnipedia
Ancient word translating to "key." The variant "clava" has the same meaning.
See also: Key to Infinite Treasure (Clava Thesaura Infinitas)
KEY EPISODE
The Quest, Part 1 - Daniel utters the Ancient word "clavia" during the fourth test to gain access to the next chamber while on a quest for the Sangraal.