{"era":"current","word":"nightclub","meaning":"An entertainment venue open at night","children":[{"era":"pre-1100","word":"night","meaning":"darkness, period of darkness","children":[{"era":"pre-500","word":"*nahts","meaning":"night","children":[{"era":"5000-2500 BCE","word":"*nekʷt-","meaning":"night","children":[],"language":"Proto-Indo-European"}],"language":"Proto-Germanic"}],"language":"Old English"},{"era":"1200s","word":"club","meaning":"a knob, a lump, an association","children":[{"era":"pre-500","word":"*klumbō","meaning":"lump, mass","children":[{"era":"5000-2500 BCE","word":"*glembʰ-","meaning":"to swell, to gather","children":[],"language":"Proto-Indo-European"}],"language":"Proto-Germanic"}],"language":"Old Norse"}],"language":"Modern English"}