addle

ad·dle  (dl)

v. ad·dled, ad·dling, ad·dles

v.tr.

To muddle; confuse: "My brain is a bit addled by whiskey" (Eugene O'Neill). See Synonyms at confuse.

v.intr.

1. To become confused.

2. To become rotten, as an egg.

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[From Middle English adel, rotten, from Old English adel, pool of excrement.]

Thesaurus

Verb	1.	addle - mix up or confuse; "He muddled the issues" muddle, puddle mix up, jumble, confuse - assemble without order or sense; "She jumbles the words when she is supposed to write a sentence"
	2.	addle - become rotten; "addled eggs" go bad, spoil - become unfit for consumption or use; "the meat must be eaten before it spoils"