ˈtɛstəmənt
A document that the author has sworn to be true; especially a will or one of the two major divisions of the Christian Bible.
And he took bread, and gave thanks, and brake it, and gave unto them, saying, This is my body which is given for you: this do in remembrance of me. Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you.
Luke 22:19-20, KJV
testāmentum (Classical) /testamentum/
Classical Latin, Rome
testament (ME) /testament/
Middle English, England
διαθήκη (Koine) /diathēkē/
Koine Greek, Eastern Mediterranean