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ratiocinate

[rash-ee-os-uh-neyt, -oh-suh-, rat-ee-] /ˌræʃ iˈɒs əˌneɪt, -ˈoʊ sə-, ˌræt i-/
verb (used without object), ratiocinated, ratiocinating.
1.
to reason; carry on a process of reasoning.
Origin
1635-1645
1635-45; < Latin ratiōcinātus past participle of ratiōcinārī to reckon, calculate, conclude, verbal derivative of ratiō reason
Related forms
ratiocinator, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ratiocinate

ratiocinate

/ˌrætɪˈɒsɪˌneɪt/
verb
1.
(intransitive) to think or argue logically and methodically; reason
Derived Forms
ratiocination, noun
ratiocinative, adjective
ratiocinator, noun
Word Origin
C17: from Latin ratiōcinārī to calculate, from ratiōreason
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 ratiocinate
v.

"to reason," 1640s, from Latin ratiocinatus, past participle of ratiocinare (see ratiocination). Related: Ratiocinant.

Online Etymology Dictionary, © 2010 Douglas Harper
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