to rescue: to snatch someone out of danger, into safety
The picture under this word is a hand reaching in and pulling someone out of harm before it closes over them. It is rescue as a decisive yank to safety, not a slow process of healing or repair. The one in danger may be cornered by an enemy, drowning, trapped, or marked for death, and the rescuer pulls them clear.
Most often the rescuer is God, and the word becomes a staple of prayer and praise: the cry "rescue me" and the testimony "he rescued me." It runs through the Psalms, the deliverance from Egypt, and the prophets. But people rescue too, whether a shepherd snatching a lamb from a lion's mouth or a leader pulling his people out of an enemy's grip.
Because the core idea is being pulled out of the grip of something, the word can stress what a person is being saved from (an enemy, the grave, sin) more than the safe place they end up. A closely related shade is escaping or being plucked free oneself rather than being rescued by another, but the underlying motion, out of danger, is the same.