[f. prec. + -NESS.] The state of being acquainted; the degree or amount of acquaintance.
1661. Boyle, Style of H. Script., 244. Afterwards by Acquaintednesse brought to Believe the Scripture upon its Own score.
1851. I. Taylor, Wesley & Method. (1852), 222. A full ministerial acquaintedness with those inexhaustible treasures of thought.