Noun, する verb, and の adjective
きょうそう
今日の朝ごはんは、昨日のパン食い競争のパンです。
Today's breakfast is the bread I got from the bread eating competition yesterday.
今は競争とかあんまりする気分じゃないんだけど。
I'm really not in the mood for a competition or anything right now.
あいつら、もうちょっと落ち着いた方がいいよ。二人共負けず嫌いのくせに、いっつも二人で競争してるんだぜ。
These guys really need to chill out. They're always competing with each other and they both hate losing.
When you compete to the point of conflict, you know that this person / entity is your competition. Gotta beat out that competition. For example, in order to beat out the competition, WaniKani has a mascot that can eat every other small furry animal that the competition has for their mascot. Case closed.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.