A person who promises to be responsible for someone else's debt or obligation if they fail to pay or perform.
From 'guarantee', which came from Spanish 'garante' (one who guarantees), possibly from Germanic roots. The -or suffix indicates a person who does the action.
When you're a guarantor, you're essentially making a legal promise to cover someone else's mistake—which is why banks love getting guarantors but most parents dread being asked to be one!
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