{"era":"current","word":"tractor","meaning":"vehicle for pulling machinery","children":[{"era":"late 19th century","word":"tractor (coined)","meaning":"something that pulls","children":[{"era":"Classical","word":"tractus","meaning":"a drawing, pulling (past participle of trahere)","children":[{"era":"Classical","word":"trahere","meaning":"to pull, draw","children":[{"era":"ancient","word":"*tragʰ-","meaning":"to draw, drag","children":[],"language":"Proto-Indo-European"}],"language":"Latin"}],"language":"Latin"}],"language":"English"}],"language":"Modern English"}