する verb
こうげきする
「コウイチ！怒り狂ったライオンの群れが俺たちの町に向かって突撃してくるよ。俺たち、もうすぐ攻撃されちまうよ。どうしたらいいんだ？」「心配するな。俺に任せとけ。」
"Koichi! There’s a pride of raging lions charging toward our town! They are going to attack us very soon. What do we do?" "Don’t worry. Leave it to me."
攻撃 is an attack. Make that into a verb and you have to attack.
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. It will help to know 攻撃 as well.