亜あ

prefix

sub-; second-rate; inferior

Prefix indicating something is subordinate, lower in rank, or of lesser quality. Common in compounds like 亜種 (subspecies) and 亜流 (follower, imitator).

• この植しょく物ぶつは亜あ種しゅに分ぶん類るいされる。

  This plant is classified as a subspecies.

• 彼かれは亜あ流りゅうの作さっ家かに過すぎない。

  He is nothing more than a second-rate writer.

prefix

-ous (low oxidation state); -ite

Chemistry prefix used in compound names to indicate a lower oxidation state, corresponding to English '-ous' or '-ite'. Example: 亜硫酸 (sulfurous acid).

• 亜あ硝しょう酸さんナトリウムは食しょく品ひん添てん加か物ぶつとして使つかわれる。

  Sodium nitrite is used as a food additive.

noun

Asia (abbr.); Argentina (abbr.); Arabia (abbr.); America (obs. abbr.)

Abbreviation used in ateji country names. 亜 alone can stand for Asia (from 亜細亜), Argentina (亜爾然丁), Arabia (亜剌比亜), and historically America (亜米利加, now obsolete). In modern Japanese, 亜 primarily appears in compounds like 東亜 (East Asia) and 欧亜 (Eurasia).

See also: アジア

• 「東とう亜あ」という言こと葉ばは東ひがしアジアを指さす。

  The term 東亜 refers to East Asia.

• 明めい治じ時じ代だいには「亜あ」がアメリカを表あらわす略りゃく称しょうとして使つかわれた。

  In the Meiji era, 亜 was used as an abbreviation for America.