{"era":"current","word":"cavity","meaning":"an empty space or hollow within a solid object or body","children":[{"era":"1200s","word":"Middle English cavite","meaning":"a hollow space","children":[{"era":"classical","word":"Latin cavitas","meaning":"hollowness, a hollow place","children":[{"era":"classical","word":"Latin cavus","meaning":"hollow","children":[],"language":"Latin"}],"language":"Latin"}],"language":"Middle English"}],"language":"Modern English"}