轂こしき

noun

wheel hub; nave

Technical term for the central part of a wheel; rarely used in everyday Japanese. The reading こく is an alternative on-reading, but こしき is more common for this character.

• 轂こしきは車しゃ輪りんの中ちゅう心しん部ぶで、スポークが集あつまる部ぶ分ぶんです。

  The hub is the central part of a wheel where the spokes meet.