Harmless
noun, な adjective, の adjective
Psh, that guy's damage is nothing. He's what I'd call "mostly harmless."
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.
マグニチュード6.2の地震がありましたが、無害でした。
There was an earthquake with a magnitude 6.2, but it was harmless.
無害のツイートにまでいちいちつっかかってるやつ、なんなの?
What's with people who troll even harmless tweets?
心配しなくていいよ。トーフグに毒は無いから。彼は無害な河豚だよ。
Don’t worry. Tofugu doesn’t have any poison. He’s a harmless blowfish.