Dear Andreas, I know the dictionary. Although it is a good attempt for its era, it is rather an insufficient source for Circassian language (at least, today). Most words were just "found" during face to face conversations, and as noted in the preface, the common language between the researcher and the Circassians was "Turkish" (during that time, most Circassian translators were using Crimean Tatar dialect, rather than Turkish). The method of the researcher was to imitate or to show an object, then to ask what it is.
That's why, there are many words answered or "understood" wrong.
These people were mostly from different tribes of the Circassians, and sometimes, even Abazins (who talk a dialect of Aphazian, not Adyghe language). As a result, there are many misunderstandings (I am not mentioning the misspellings or wrong transcriptions, but I can give credit for this, I can never write the true transcription of the Circassian words
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About the subject, words given for Sword (Sabre) are all variants of seshkho (сэшхо) = shashka
seys-shooâ is directly referring to seshkho, and sesh-wey is the same word in genitive case.
The word written as tzéshwey is most probably s-seshkhoe(y), which means "my shashka"
The first correspondence for "sabre" above this is a little bit more correct, because "seshkhém" means "the shashka".
However, the second word given may explain the tragedy, because the word given as "pee-yoop sho" is not a noun, but a verb that any Circassian can understand: It means "cutting", or, literally, "it cuts"
Best