When Rashi uses the synonym method he does not explain the meaning of a word but rather the distinction between two similar words both of whose meanings we already know.

The following Hebrew words all refer to tieing.
• Kuph-Shin-Resh, Kesher; to tie
• Cheth-Beth-Resh, Chibber: sewing / uniting
• Cheth-Besh-Shin, Chabbash bandaging

In our article Peshat and Derash: A New Intuitive and Logical Approach, which can be found on the world-wide-web at http://www.Rashiyomi.com/rashi.pdf we have advocated punchy translations of Biblical verses as a means of presenting Rashi comments. The following translation of verse Gn47-25c:26 embeds the Rashi translation Chabbash means bandaging or a bandage type motion. And Moses brought the sons of Aaron, and put coats upon them, and girded them with girdles, and bandaged the turbans upon them; as the Lord commanded Moses.

Advanced Rashi: We can clarify further using other Rashi rules as follows:
• The primary meaning of Cheth-Beth-Shin is to bandage. Some verses with this usage are Is01-06, Is30-26, Ez34-04.
• Recall the triple FFF rule which holds that words can name things with similar Forms, Functions, or Feel. Thus an orange dress has a similar form to the fruit, orange. Similarly the pentagon is named after its shape. So too the saddling of a donkey is called the bandaging of a donkey because the forms of the two activities are the same.
• Similarly, bandaging can refer to the winding placement of a turban on the head since the form of bandaging and winding a turban are the same.

Note that many translators simply say that Chabash is a form of tieing. By using the synonym method we obtain a greater acuity of translation: Technically, it is a tieing motion but it really is simply a strengthening of an already cohesive whole (such as wounded skin). Such improvements of clarity of translation are frequent when using the synonym method.