• 競争きょうそう — competition, rivalry
• 競技きょうぎ — sports competition, event
• 競馬けいば — horse racing
• 競合きょうごう — competition (business)
• 競せる — to bid, to compete

Formed from the character for "two people" (兄兄 or 竟) and the radical for "stand" (立), 競 originally conveyed the idea of standing face-to-face in rivalry. The kun-yomi きそう means to compete, and せる is used in auction-style settings or contests of price.

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.

🎧 The readings キョウ and ケイ are used in compounds like 競技きょうぎ and 競馬けいば. The kun-yomi きそう and せる are used in everyday language involving rivalry or auctions.