Basic Guidelines For English Spellings
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1humorístico with object Make (someone) unable to think clearly; confuse.
2no object (of an egg) become rotten, producing no chick.
(of an egg) rotten.
Middle English (in addle (adjective)): from Old English adela ‘liquid filth’, of Germanic origin; related to Dutch aal and German Adel ‘mire, puddle’.