Acquainted
来自Big Physics
Middle English: from Old French acointier ‘make known’, from late Latin accognitare, from Latin accognoscere, from ad- ‘to’ + cognoscere ‘come to know’.
etymonline
acquainted (adj.)
early 13c., "personally known;" past-participle adjective from acquaint (v.). Of skills, situations, etc., from late 15c.
I have been one acquainted with the night.
I have walked out in rain — and back in rain.
I have outwalked the furthest city light.
[Robert Frost, from "Acquainted with the Night"]
Acquaint also was used as an adjective (late 13c.) "acquainted."