Definition
From Mounce's Concise Greek-English Dictionary
Strong's Definition
probably akin to G4506 (ῥύομαι)); to strengthen, i.e. (impersonal passive) have health (as a parting exclamation, good-bye)
Mounce Concise Greek-English Dictionary
to strengthen, render firm; to be well, enjoy firm health; at the end of letters, like the Latin vale, farewell, Acts 15:29*
Translated in KJV as
farewell
Etymology
prolongation from (to dart;
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