Etymology of the English word acquainted
the English word acquainted
derived from the English word acquaint
derived from the Old French word acointier
derived from the Latin word accognitare
derived from the Latin word accognitus
derived from the Latin word accognoscere (recognize)
derived from the Latin word cognoscere (to know; become acquainted with, aware of; recognize)
using the Latin prefix co-
derived from the Latin word gnoscere (to recognize; examine, study, inspect; get to know; learn, find out)
derived from the Proto-Indo-European root *gnō-