Longman Dictionary of Contemporary English homepage

Date: 1200-1300
Language: Old French
Origin: acointier, from Medieval Latin accognitare, from Late Latin accognoscere 'to know perfectly', from Latin ad- 'to' + cognoscere 'to know'

acquaint

verb
     
ac‧quaint [transitive]
1

acquaint yourself with something

formal to deliberately find out about something:
I need to acquaint myself with the new regulations.
2

acquaint somebody with something

formal to give someone information about something:
You need to acquaint the police with the facts.

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