How does tie you over mean make do till later?

Actually the phrase is "tide you over" and the origin I'm not sure of. For instance if someone came asking for a certain amount of money, I might respond, How much can you get by with. If the respondant state a lesser amount in order to make it till a later date, then I would give the person the lesser amount just to "tide them Over" or help them until something else came along to help them. Hope this helps

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