"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.
Entries linking to veracious
*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."
-ous
word-forming element making adjectives from nouns, meaning "having, full of, having to do with, doing, inclined to," from Old French -ous, -eux, from Latin -osus (compare -ose (1)). In chemistry, "having a lower valence than forms expressed in -ic."