{"era":"current","word":"rooftop","meaning":"the top surface of a building's roof","children":[{"era":"pre-1100","word":"roof","meaning":"roof, covering of a building","children":[{"era":"pre-1100","word":"Proto-Germanic *hrōfą","meaning":"roof, covering","children":[],"language":"Proto-Germanic"}],"language":"Old English"},{"era":"pre-1100","word":"top","meaning":"top, summit","children":[{"era":"pre-1100","word":"Proto-Germanic *tuppaz","meaning":"tuft, top, summit","children":[],"language":"Proto-Germanic"}],"language":"Old English"}],"language":"Modern English"}