{"era":"current","word":"ballistics","meaning":"the science of the motion and behavior of projectiles","children":[{"era":"modern","word":"ballistic + -s","meaning":"a noun formed from ballistic, with the plural or collective -s","children":[{"era":"modern","word":"ballistic","meaning":"relating to projectiles or their motion","children":[{"era":"classical","word":"ballistikos","meaning":"able to throw","children":[{"era":"classical","word":"ballein","meaning":"to throw","children":[],"language":"Ancient Greek"}],"language":"Ancient Greek"}],"language":"English"}],"language":"English"}],"language":"Modern English"}