Peace
Harmony
noun, な adjective
The flat peace. This is a peace that will last, because there's no waves... no ripples... just flat. This is plain old peace.
へいわ
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.
いつになったら、世界は平和になるんだろうか。
So when do you think the world will find peace?
安全で平和な地いきに住みたいです。
I want to live in a safe and harmonious community.
どうして日本ではみんなあの平和のシンボルを写真にかざすの？
Why does everyone in Japan use the peace sign in pictures?