cog

n.轮齿；从属地位的人或物；诈骗；雄榫

v.用雄榫连接；欺骗

The wheel engages with the cog and turns it. 轮子咬住轮齿并带动它转动.

If a person doesn't do his utmost,he will be a permanent cog in the machine. 人若不竭尽全力，将永远是一个无名小卒。

The gamesters will palm the dice and will cog. 赌徒们藏骰子在手掌中并且要诈赌。