From en.wiktionary.org:
** English
[2009]
*** Etymology
[en], 1829 US,<ref name=oetlyd>[R:Online Etymology Dictionary] jocular coinage like contemporary [en].<ref name=quinion>[entry=Hornswoggle] Presumably [en] + [en] with humorous faux ablaut or combination with [en] (compare later [en], 1923), perhaps inspired by lassoed steers trying to escape by moving their head.[1]<ref name=quinion/>
*** Pronunciation
- [en] - [en] - [en] - [en] - [en]
*** Verb
[en-verb]
1. [en] To deceive or trick .
**** Synonyms
- [deceive or trick] [en] , [en] , [en]
**** Derived terms
{{col|en|hornswoggler }}
**** Translations
[to deceive or trick]
- Armenian: [hy] - Czech: [cs] - Finnish: [fi] - Italian: [it] - Russian: [ru] - Scottish Gaelic: [gd] [trans-bottom]
*** Noun
[?]
1. [en] nonsense ; humbug
**** See also
- [en] - Appendix:Fanciful 19th century American coinages
*** References
References: [1]. _A Dictionary of the Old West,_ Peter Watts
- [en]