{"era":"current","word":"knob","meaning":"a rounded lump or projection","children":[{"era":"1200s","word":"Middle Low German knobbe / Middle Dutch knobbe","meaning":"lump, knob","children":[{"era":"1100s-1400s","word":"Middle English knobbe","meaning":"lump, rounded projection","children":[{"era":"pre-1100","word":"Proto-Germanic *knubbō","meaning":"lump, rounded mass","children":[],"language":"Proto-Germanic"}],"language":"Middle English"}],"language":"Middle Low German / Middle Dutch"}],"language":"Modern English"}