The children raced over to the new teacher.
Tofugu is so unique that there is nobody else to compete with. They are the so-called sole winner.
Koichi and Viet competed with each other to demonstrate their prowess at the annual Kendo competition held in the Tofugu office.
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means compete so the verb vocab version means to compete.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you:
You have to compete for kisses (きそ) from that boy/girl you like. Imagine yourself doing this, competing with a rival.