Completely removed, destroyed, or eliminated so that nothing remains.
From Latin 'eradicare': 'e-' (out) plus 'radix' (root). Originally meant literally to pull something out by the roots, then metaphorically to destroy completely.
Smallpox was eradicated in 1980, making it one of humanity's greatest victories—it's the only human disease we've completely eliminated from Earth, saving millions of lives by pulling out the disease's 'roots'!
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