The kanji 亜 generally conveys the meaning of "second," "inferior," "Asia," or "next." It often suggests a secondary position or something that comes after or is similar to something else. It can also imply a part of a larger whole or a region.

・On-yomi (音読み): ア (a) ・Kun-yomi (訓読み): None, as the meaning is often incorporated into compound words.

⚫︎アジア Translation: Asia ⚫︎亜鉛 Translation: Zinc (literally, "second element" in the periodic table) ⚫︎亜熱帯 Translation: Subtropical (literally, "sub-tropical zone")

The kanji 亜 is a 形声文字 (keisei moji), or phono-semantic compound. The character is composed of the radical 二 (ni, meaning "two") and a phonetic component. The "two" radical signifies a secondary or next position. The specific phonetic component contributes to the pronunciation. The character developed to represent the idea of something that is "second," "inferior," or "subordinate" to something else, as well as to refer to the continent of Asia.