{"era":"current","word":"ambulance","meaning":"emergency medical transport vehicle","children":[{"era":"early 1800s","word":"ambulance","meaning":"field hospital, mobile military hospital","children":[{"era":"1700s","word":"hôpital ambulant","meaning":"walking/mobile hospital (Napoleonic military usage)","children":[{"era":"1600s","word":"ambulant","meaning":"moving about, itinerant","children":[{"era":"classical","word":"ambulare","meaning":"to walk, to go about","children":[],"language":"Latin"}],"language":"French/Latin"}],"language":"French"}],"language":"French"}],"language":"Modern English"}