Meaning and Usage
The word "球" (きゅう) primarily refers to a sphere or ball-shaped object. It can mean a physical ball used in sports, a globe like the Earth, or even a light bulb (電球). This word is common in both everyday and scientific contexts.
Common Collocations
- 野球の球 (やきゅうのきゅう): baseball ball, used in sports contexts.
- 地球 (ちきゅう): the Earth, literally "ground sphere."
- 電球 (でんきゅう): electric light bulb.
Nuances and Register
"球" is a neutral noun and can be used in formal and informal contexts. When referring to sports balls, it often appears in compound words. When used alone, context clarifies the meaning.
Common Confusions
Learners sometimes confuse "球" with "玉" (たま), which also means ball or sphere but is often used for smaller or decorative balls. "球" tends to emphasize the geometric or functional aspect of a sphere, especially in scientific or sports contexts.