late 13c., verray "true, real, genuine," later "actual, sheer" (late 14c.), from Anglo-French verrai, Old French verai "true, truthful, sincere; right, just, legal," from Vulgar Latin *veracus, from Latin verax (genitive veracis) "truthful," from verus "true" (source also of Italian vero), from PIE root *were-o- "true, trustworthy." Meaning "greatly, extremely" is first recorded mid-15c. Used as a pure intensive since Middle English.
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Harper, D. (n.d.). Etymology of Vera. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/Vera