One Etymology field is initially available in each entry at the entry level. You can insert more than one.
In the Navigation Pane, click Lexicon, and then click Lexicon Edit.
In the Entries pane, click the desired entry.
In the Entry pane, if you cannot see the Etymology field, show hidden fields.
Do any of these steps:
Click the empty Etymology field and then start typing.
In this case, what you type appears in the Source Form field in the default analysis writing system.
On the Insert menu, click Etymology.
Right-click the Etymology field label, and then click Insert Etymology.
Click the Etymology field label to display the menu button 
, and then click Insert Etymology.
To insert another etymology field set, click the Insert Etymology link that appears with an existing Etymology field.
Click the menu button 
on the Information bar, and then click Insert Etymology.
A set of associated fields appears.
Enter contents in the fields.
Reorder the etymologies if you inserted more than one and the order in Dictionary is not right.