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cautious

[kaw-shuh s] /ˈkɔ ʃəs/
adjective
1.
showing, using, or characterized by caution:
a cautious man; To be cautious is often to show wisdom.
Origin
1630-1640
1630-40; cauti(on) + -ous
Related forms
cautiously, adverb
cautiousness, noun
hypercautious, adjective
hypercautiously, adverb
hypercautiousness, noun
supercautious, adjective
ultracautious, adjective
ultracautiously, adverb
ultracautiousness, noun
uncautious, adjective
uncautiously, adverb
uncautiousness, noun
Synonyms
prudent, guarded, wary, chary, circumspect, watchful, vigilant. See careful.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ultra cautious

cautious

/ˈkɔːʃəs/
adjective
1.
showing or having caution; wary; prudent
Derived Forms
cautiously, adverb
cautiousness, noun
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
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Word Origin and History for ultra cautious

cautious

adj.

1640s, from caution + -ous. The Latin word for this was cautus "careful, heedful." Related: Cautiously; cautiousness.

Online Etymology Dictionary, © 2010 Douglas Harper
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