Etymology
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veracious (adj.)
"habitually disposed to speak truth," 1670s, from Latin verac-, stem of verax "according to truth, truthful," from verus "true" (from PIE root *were-o- "true, trustworthy") + -ous.
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*were-o- 
*wērə-o-, Proto-Indo-European root meaning "true, trustworthy."

It forms all or part of: aver; Varangian; veracious; veracity; verdict; veridical; verify; verisimilitude; verism; veritas; verity; very; voir dire; warlock.

It is the hypothetical source of/evidence for its existence is provided by: Latin verus "true;" Old Church Slavonic vera "faith," Russian viera "faith, belief;" Old English wær "a compact," Old Dutch, Old High German war, Dutch waar, German wahr "true;" Welsh gwyr, Old Irish fir "true."
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