Made extinct, eliminated, or put out; an archaic or alternate spelling variant of 'extinguished' with a different etymology emphasis.
Alternative past participle of extinguish, possibly influenced by Middle English spelling variations. This form appears occasionally in older texts but is now considered a spelling error.
English spelling was wild in the 1600s-1700s, and you'd see 'extinguised' in some texts while others used 'extinguished'—thankfully, spelling standardized, but it shows how fluid language used to be!
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