acquainted

tutustunut, perehtynyt Personally known; familiar.
1748. HUME, David. An enquiry concerning human understanding. In: L. A. SELBY-BIGGE, M. A. Enquiries concerning the human understanding and concerning the principles of moral. 2. ed. London: Oxford University Press, 1973. § 16.

Suppose, therefore, a person to have enjoyed his sight for thirty years, and to have become perfectly acquainted with colours of all kinds