i Register
In some senses, acquaint is marked as archaic, obsolete. Watch for register when choosing this word.
verb
To furnish or give experimental knowledge of; to make (one) know; to make familiar.
I think you should acquaint him with the realities of the situation.
He is despised and reiected of men, a man of sorrows, and acquainted with griefe: and we hid as it were our faces from him; hee was despised, and wee esteemed him not.
To communicate notice to; to inform; let know.
Acquaint her here, of my Sonne Paris Loue,
I muſt acquaint you, that I haue recciu'd New-dated Letters from Northumberland:
To familiarize; to accustom.
October 2 1642, Isaac Basire, letter to John Evelyn What success it may further have I shall acquaint you at my coming over
adj
Acquainted.
[I]f you have skimmed through even a paragraph of my poor neglected little magnum opus you will know I am unusually acquaint with my inner workings.