Set on fire or made bright with flames; in archaic usage, burning brightly or ablaze.
The past tense and past participle form of the archaic verb 'emblaze,' created by adding '-ed' to indicate a completed action.
This word is so archaic that it's barely used in modern English, but it appears in old poetry and medieval texts—like 'the sky emblazed with stars,' treating the whole sky as if it were burning with light. Medieval writers saw brightness as a kind of fire.
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