Pronounced kēng (entering tone) — same as "kēng". Also, "Shuowen Jiezi" explains it as "a part of a carriage". Also, "Jiyun" notes the pronunciation as qiān (entering tone) — same as "qiān". The meaning is the same. Also, "Jiyun" notes the pronunciation as zhěn (entering tone) — same as "zhěn". The meaning is the same as "zhěn".