{"era":"current","word":"firefighter","meaning":"a person trained to extinguish fires and respond to related emergencies","children":[{"era":"pre-1100","word":"fire","meaning":"fire","children":[],"language":"Old English"},{"era":"current","word":"fighter","meaning":"one who fights","children":[{"era":"pre-1100","word":"fight","meaning":"to contend or battle","children":[],"language":"Old English"}],"language":"Modern English"}],"language":"Modern English"}