Our word testament comes from the Greek diaqhkh, meaning “will, testament, or covenant.” The best translation, Biblically speaking, is covenant, as the Old and New Testaments are God’s covenants (or agreements) with humanity.
This is an excellent short overview on the Old and New Testaments by Sheila who lives and ministers with her husband in Italy. Definitely worth a click!
Worthy is the Lamb! Blessings!