{"era":"1400s","word":"slipper","meaning":"light shoe for indoor wear","children":[{"era":"1300s","word":"slip","meaning":"to slide unintentionally","children":[{"era":"1200s","word":"slippen","meaning":"to slide, to glide","children":[{"era":"pre-1100","word":"slipan","meaning":"to glide, to slide","children":[{"era":"pre-500","word":"*slipanan","meaning":"to glide","children":[{"era":"ancient","word":"*sleib-","meaning":"to slide, to glide","children":[],"language":"Proto-Indo-European"}],"language":"Proto-Germanic"}],"language":"Old English"}],"language":"Middle English"}],"language":"English"},{"era":"current","word":"-er","meaning":"suffix forming agent nouns","children":[],"language":"English"}],"language":"Modern English"}