To provide evidence or proof to support or prove the truth of a claim or statement. To give substance or reality to something through concrete evidence.
From Latin 'substantia' (substance, essence) + '-ate.' The root 'sub-' (under) + 'stare' (to stand) literally means 'standing under,' suggesting the foundation or essential nature that supports something.
Substantiate = 'substance-iate' — you're giving substance to your claims with real evidence. Without substantiation, your argument is just hot air; with it, you have something solid to stand on.
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