A Certain Country
noun
A certain country is a certain country!
This word uses the on'yomi for both kanji, and you learned those readings with the kanji. You should be able to read this on your own.
日本に留学生を多く送りこんでいる某国で教えています。
I teach in a country that sends a lot of exchange students to Japan.
梓川さんは派遣員として某国大使館に勤めていました。
Azusagawa-san worked as a temporary employee at a certain country's embassy.
菅原沙羅が某国のスパイであるという嫌疑はぬぐえません。
We can't shake the suspicion that Sara Sugawara is a spy for a certain country.