An archaic or dialect term, possibly relating to chess or a variant spelling from Middle English.
An obscure or possibly dialectal form from Middle English with uncertain etymology; it may be a variant or corruption of 'chess' or related terms, but evidence is limited in historical texts.
Some words are so rare that even dictionaries aren't completely sure what they meant—'chessom' is one of those linguistic mysteries that reminds us that most of the English language we use today survived while thousands of alternatives simply vanished.
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