Wiktionary
vb. (context rare English) To undo (one's or someone's) acquaintance (with someone or something).
Usage examples of "unacquaint".
A bill being formed accordingly, passed through both houses without opposition, though in the preceding session a bill to the same purpose had miscarried among the peers: a miscarriage probably owing to their being unacquainted with the sentiments of his majesty, as some of the duties upon tallow constituted part of one of the branches appropriated for the civil list revenue.
He is not unacquainted with the conversational amenities of the cordial and interesting stranger, who, having had the misfortune of leaving his carpet-bag in the cars, or of having his pocket picked at the station, finds himself without the means of reaching that distant home where affluence waits for him with its luxurious welcome, but to whom for the moment the loan of some five and twenty dollars would be a convenience and a favor for which his heart would ache with gratitude during the brief interval between the loan and its repayment.
It is impossible to begin a story which must of necessity tax the powers of belief of readers unacquainted with the class of facts to which its central point of interest belongs without some words in the nature of preparation.
There is a very common feeling that it is unbecoming in one of my sex to address one of your own with whom she is unacquainted, unless she has some special claim upon his attention.
He was unacquainted with the fact that Lenley had trapped The Shadow in a prison cell where death was due within the next half minute.
English poets, interlarded with French phrases, which he retained for their significance, on the recommendation of his friends, being himself unacquainted with that or any other outlandish tongue.
The lady had been bred in the country, was unacquainted with the world, and of a very sanguine disposition, which her short trial of matrimony had not served to cool.
Nor am I unacquainted with a military life, which was once my glory and occupation.
I have heard Johnson gratefully acknowledge, in his presence, the kind and effectual support which he gave to his London, though unacquainted with its authour.
Greek and Hebrew texts, and all the shades of opinions resulting, he was unacquainted with even the alphabet of human nature.
If it were not, he was too young and unacquainted with misfortune not to long for a few kind words of comfort.
I was so entirely unacquainted with the subject that I understood nothing about it even then.
I know full well how changed I am, I know you are not unacquainted with my history, and I know what a noble love that is which is so faithful.
I believe, sincerely glad of being relieved from so burdensome a charge as the conduct of an army must be to a man unacquainted with military business.
With such a minister, and such a parliament, let us suppose a case which I hope will never happen: a prince upon the throne, uninformed, ignorant, and unacquainted with the inclinations and true interest of his people, weak, capricious, transported with unbounded ambition, and possessed with insatiable warice.