{"era":"current","word":"infiltrate","meaning":"to penetrate or enter surreptitiously, or to pass through by filtration","children":[{"era":"1400s","word":"infiltrate","meaning":"earlier adjective form","children":[{"era":"medieval","word":"infiltrātus","meaning":"filtered in; seeped through","children":[{"era":"medieval","word":"infiltrō","meaning":"to filter in; to seep through","children":[],"language":"Medieval Latin"}],"language":"Medieval Latin"}],"language":"Middle English"}],"language":"Modern English"}