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Italian word sfida comes from Italian disfidare, and later Italian disfida ((literary) challenge.)
disfidare (Italian)
(intransitive, obsolete) to distrust (someone). (transitive, literary) to challenge (to a duel or competition). (transitive, obsolete) to deem (a sick person) hopeless.
disfida (Italian)
(literary) challenge.
sfida (Italian)
Challenge.