{"era":"current","word":"kidney","meaning":"organ for urine excretion","children":[{"era":"1200s","word":"kidenei","meaning":"kidney","children":[{"era":"pre-1100","word":"cyd-ney","meaning":"kidney (first element uncertain, second -ey related to 'egg' or 'island' by folk etymology)","children":[],"language":"Old English"}],"language":"Middle English"}],"language":"Modern English"}