Variant of infiltrate
- to pass, or cause (a fluid, cell, etc.) to pass, through small gaps or openings; filter
- to pass through, as in filtering
- to pass, or cause (individual troops) to pass, through weak places in the enemy's lines in order to attack the enemy's flanks or rear
- to penetrate, or cause to penetrate (a region or group) gradually or stealthily, so as to attack or to seize control from within
Origin: in- + filtrate
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