{"era":"current","word":"endurance","meaning":"the ability to continue despite difficulty or fatigue","children":[{"era":"1100s","word":"Old French endurance","meaning":"the act or quality of enduring","children":[{"era":"1100s","word":"endurer","meaning":"to harden, bear, or withstand","children":[{"era":"classical","word":"indūrāre","meaning":"to harden or make hard","children":[{"era":"classical","word":"dūrus","meaning":"hard","children":[],"language":"Latin"}],"language":"Latin"}],"language":"Old French"}],"language":"Old French"}],"language":"Modern English"}