{"era":"current","word":"undo","meaning":"To reverse the effect of a previous action.","children":[{"era":"pre-1100","word":"un-","meaning":"not, reversal","children":[{"era":"pre-500","word":"*un-","meaning":"not","children":[],"language":"Proto-Germanic"}],"language":"Old English"},{"era":"pre-1100","word":"do","meaning":"to put, to place, to make","children":[{"era":"pre-500","word":"*dōną","meaning":"to put, to place","children":[{"era":"pre-2000 BCE","word":"*dʰeh₁-","meaning":"to put, to place","children":[],"language":"Proto-Indo-European"}],"language":"Proto-Germanic"}],"language":"Old English"}],"language":"Modern English"}