verisimilitude (n.)

"appearance of truth or reality, likelihood," c. 1600, from French verisimilitude (1540s), from Latin verisimilitudo "likeness to truth," from veri, genitive of verum, neuter of verus "true" (from PIE root *were-o- "true, trustworthy") + similis "like, resembling, of the same kind" (see similar). Related: Verisimilar.