asseveration

Etymology

From Latin assevērātiō, from assevērō.

noun

1. An earnest affirmation; a declaration of support.
   The true oath consists in the simple asseveration, uttered in perfect consciousness and under a sense of the presence of God, before Him, and in Him. 1861, J[ohann] P[eter] Lange, translated by Alfred Edersheim, Theological and Homiletical Commentary on the Gospel of St Matthew. Specially Designed and Adapted for the Use of Ministers and Students., volume I, Edinburgh: T. & T. Clark,[…]; London: Hamilton, Adams, and Co.; Dublin: John Robertson, page 228