well-informed about international affairs; person well-informed about international affairs
Refers to both the quality of being knowledgeable about international matters and a person who possesses such knowledge. Often used in contexts like politics, economics, or global culture.
He is well-informed about international affairs and knows news from around the world.
I asked my friend who is knowledgeable about international affairs about the situation abroad.
Compound of 国際 (international) and 通 (connoisseur, expert). The suffix 通 is commonly attached to nouns to indicate a person well-versed in that area.