dazzle v.

late 14c., dasen, "be stunned; make bewildered," perhaps from Old Norse *dasa (compare dasask "to become weary," with reflexive suffix -sk). Or perhaps from Middle Dutch dasen "act silly." Perhaps originally "to make weary with cold" (a sense in English from c. 1400), which is the sense of Icelandic dasask (from the Old Norse word). Related: Dazed.

"to blind by excess of light," 1590s, from be- + dazzle (v.). Also figurative. Related: Bedazzled; bedazzling.

 "A word, app. of U.S. coinage, used to express the ideas of bewilderment or confusion, rapid stir and bustle, riotous jollity or intoxication, etc. Also, deception, fraud; extravagant publicity" [OED],  1886, American English slang, varied reduplication of dazzle (q.v.).

My confrère, The Chevalier, last month gave a new name to the scarfs of disjointed pattern when he called them the razzle-dazzle. The name was evidently a hit of the most patent character, for in several avenue and Broadway stores the clerks have thrown out a display of broken figures before me and explained that the ruling style at present was the razzle-dazzle, and the word seems to have been equally effective with the public, for when it is quoted by the live salesman, the customer, I am told is at once interested and caught by it. [Clothier and Furnisher magazine, January 1889]

Meaning "state of confusion" is from 1889.