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insatiable

[in-sey-shuh-buh l, -shee-uh-]
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adjective
  1. not satiable; incapable of being satisfied or appeased: insatiable hunger for knowledge.
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Origin of insatiable

1400–50; late Middle English insaciable < Latin insatiābilis; see in-3, satiable
Related formsin·sa·tia·bil·i·ty, in·sa·tia·ble·ness, nounin·sa·tia·bly, adverb

Synonyms

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voracious, unquenchable, bottomless.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for insatiable

insatiable

insatiate (ɪnˈseɪʃɪɪt)

adjective
  1. not able to be satisfied or satiated; greedy or unappeasable
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Derived Formsinsatiability, insatiableness or insatiateness, nouninsatiably or insatiately, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for insatiable

adj.

early 15c., insaciable, from Old French insaciable (13c.), or directly from Late Latin insatiabilis "not to be satisfied," from in- "not, opposite of" (see in- (1)) + satiabilis, from satiare (see satiate). Related: Insatiably.

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Online Etymology Dictionary, © 2010 Douglas Harper