• 競争きょうそう — competition, rivalry
• 競技きょうぎ — sports match, contest
• 競馬けいば — horse racing
• 競合きょうごう — competition (business)
• 競売きょうばい — auction
• 競演きょうえん — joint performance, contest
• 競作きょうさく — competing works (literary/art)
• 競せる — to bid, to compete

The top part shows two figures (兄兄, or the form 竟), suggesting rivals facing each other. With the radical 立 (“stand”), the whole character depicts standing in opposition — hence, to compete or vie. The readings きそう (to compete) and せる (to bid) capture this sense of rivalry.

彼かれは 競争きょうそうが 好すきです。
He likes competition.

市場しじょうで 価格かかくを競せり合あった。
They competed on price in the market.