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Alter

[awl-ter] /ˈɔl tər/
noun
1.
David, 1807–81, U.S. physicist.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for d. alter

alter

/ˈɔːltə/
verb
1.
to make or become different in some respect; change
2.
(transitive) (informal, mainly US) a euphemistic word for castrate, spay
Derived Forms
alterable, adjective
alterably, adverb
alterability, noun
Word Origin
C14: from Old French alterer, from Medieval Latin alterāre to change, from Latin alter other
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for d. alter

alter

v.

late 14c., "to change (something)," from Old French alterer "change, alter," from Medieval Latin alterare "to change," from Latin alter "the other (of the two)," from PIE *al- "beyond" (see alias (adv.)) + comparative suffix -ter (cf. other). Intransitive sense "to become otherwise" first recorded 1580s. Related: Altered; altering.

Online Etymology Dictionary, © 2010 Douglas Harper
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