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invasive (adj.)

"tending to invade, aggressive," mid-15c., invasif, from Old French invasif (15c.) or directly from Medieval Latin invasivus "invasive," from invas-, past-participle stem of invadere "go into; attack, invade," from in- "in" (from PIE root *en "in") + vadere "go, walk" (see vamoose).

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