{"era":"current","word":"observation","meaning":"Act of observing","children":[{"era":"14th century (French), classical (Latin)","word":"observation","meaning":"a watching, heed","children":[{"era":"classical","word":"observatio","meaning":"a watching, heed","children":[{"era":"classical","word":"observare","meaning":"to watch, note, attend to","children":[{"era":"classical","word":"ob-","meaning":"before, toward","children":[],"language":"Latin prefix"},{"era":"classical","word":"servare","meaning":"to keep, watch, guard","children":[],"language":"Latin"}],"language":"Latin"}],"language":"Latin"}],"language":"Old French or Latin"}],"language":"Modern English"}