Strong's G1805 — ἐξαγοράζω (verb)
exagorazo (ex-ag-or-ad'-zo) v.
1. to buy up, i.e. ransom
2. (figuratively) to rescue from loss (improve opportunity)
[from G1537 and G59]
KJV: redeem 
Root(s): G1537, G59 
Hebrew root: ἀγοράζω
Occurrences: 4