cosh

[kosh] Origin

cosh

1[kosh] Chiefly British Slang.
noun
1.
a blackjack; bludgeon.
verb (used with object)
2.
to hit on the head with a cosh.

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Cosh is one of our favorite verbs.
So is peculate. Does it mean:
to introduce subtleties into or argue subtly about.
to steal or take dishonestly (money, esp. public funds, or property entrusted to one's care); embezzle.

Origin:
1865–70; perhaps < Romany kosh, koshter stick
Dictionary.com Unabridged

cosh

2[kosh]
noun Mathematics.

Origin:
1870–75; cos(ine) + h(yperbolic)
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins
World English Dictionary
cosh1 (kɒʃ)
 
n
1.  a blunt weapon, often made of hard rubber; bludgeon
2.  an attack with such a weapon
 
vb
3.  to hit with such a weapon, esp on the head
 
[C19: from Romany kosh, from koshter skewer, stick]

cosh2 (kɒʃ, ˈkɒsˈeɪtʃ)
 
n
hyperbolic cosine; a hyperbolic function, cosh z = ½(ez + e--z), related to cosine by the expression cosh iz = cos z, where i = √--1
 
[C19: from cos(ine) + h(yperbolic)]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

cosh
"stout stick," 1869, of unknown origin.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
cosh  
Abbreviation of hyperbolic cosine
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Abbreviations & Acronyms
cosh
hyperbolic cosine
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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