You can insert multiple Etymology field sets in an entry. Their order in the entry determines their order in the Dictionary view.
In the Navigation Pane, click Lexicon, and then click Lexicon Edit.
In the Entries pane, click the entry in which you will reorder etymological information.
In the Entry pane, if you cannot see the Etymology fields, show hidden fields.
Do one of the following:
Right-click the label for an Etymology field, and then select Move Etymology Up or Move Etymology Down on the menu.
Click the label for an Etymology field. Click the menu button
that appears, and then select Move Etymology Up or Move Etymology Down on the menu.
The position of that Etymology field changes. The order changes in Dictionary, as observed in the preview pane.
Repeat this process until the desired order is displayed.
Enter etymological information
Etymology (Configure Dictionary)