害
This Chinese character means harm, damage.
You can watch how to write this. - (「害」の書き順（筆順）動画 - 漢字書き順辞典)
This Chinese character is usually read as "がい".
"有害 (ゆうがい)" is "な" adjective which means harmful.
"妨害 (ぼうがい)" means disturb.
"損害 (そんがい)" means damage, loss.
"災害 (さいがい)" means disaster.
"害虫 (がいちゅう)" means harmful insect.
Do not harm people for no reason.
As long as we do not harm others, we are free to act freely.
By Higashi-Mikawa Kyōjindō Shujin (東三河狂人堂主人)