I'm thinking it might be more advantages to *describe* the condition we want to be free of rather than use a single word (since that's my modus operandi when I translate from ancient Greek ). By "free from anxiety" I mean...
Free from incessant, nagging doubt or worry of whether past actions were the right ones to take, whether present circumstances are the right course to take, and whether the future is to dreaded.
That's just a first draft for conversation!