'Save' in the Bible

for, seeing in the wisdom of God the world through the wisdom knew not God, it did please God through the foolishness of the preaching to save those believing.

for what, hast thou known, O wife, whether the husband thou shalt save? or what, hast thou known, O husband, whether the wife thou shalt save?

I became to the infirm as infirm, that the infirm I might gain; to all men I have become all things, that by all means I may save some.