{"era":"current","word":"relentless","meaning":"not yielding or showing pity","children":[{"era":"late 14c.","word":"relent","meaning":"to soften or become less harsh","children":[{"era":"classical","word":"lentus","meaning":"slow, viscous, supple","children":[],"language":"Latin"}],"language":"Anglo-French"},{"era":"pre-1100","word":"-less","meaning":"suffix meaning lacking or without","children":[{"era":"pre-1100","word":"*lausaz","meaning":"devoid of, free from","children":[],"language":"Proto-Germanic"}],"language":"Old English"}],"language":"Modern English"}