An archaic or poetic past tense of fix; the old spelling of 'fixed' still seen in older texts.
From Middle English 'fixen,' from Old French 'fixer.' The -t ending was an alternative past tense marker in older English, similar to 'learnt' vs 'learned'.
Reading Shakespeare or Milton, you'll see 'fixt' instead of 'fixed,' and this shows English spelling was still in flux in the 1600s—different printers had different preferences, and standardization didn't happen until dictionaries became common.
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