The kanji 球 primarily represents "sphere," "ball," or "globe." This encompasses anything that is round or spherical in shape, from a physical ball to a conceptual sphere of influence. It suggests a three-dimensional, rounded object.

・On-yomi (音読み): キュウ - Kyū ・Kun-yomi (訓読み): たま - Tama (meaning "ball," "sphere")

⚫︎地球球 Translation: Earth (literally, "earth sphere") ⚫︎野球球 Translation: Baseball (literally, "field ball") ⚫︎水球 Translation: Water Polo (literally, "water ball")

The kanji 球 is a phono-semantic compound. The left side is 玉 たま meaning "ball", "jewel," or "sphere," acting as the semantic (meaning) component, indicating the core concept of something round. The right side is 求 きゅう which means “to seek”, “to ask”, or “to request,” and here provides the phonetic component, indicating the pronunciation. Therefore, the character was formed by combining components that suggest both the meaning and pronunciation of the word.