{"era":"current","word":"screwdriver","meaning":"a hand tool used to turn screws","children":[{"era":"c. 1400","word":"screw","meaning":"a spiral threaded pin or bolt","children":[{"era":"c. 1400","word":"escröe, escroue","meaning":"nut; cylindrical socket; screw-hole","children":[],"language":"Old French"}],"language":"English"},{"era":"late 14th c.","word":"driver","meaning":"one that drives","children":[{"era":"pre-1100","word":"drive","meaning":"to propel or move","children":[],"language":"Old English"}],"language":"English"}],"language":"Modern English"}