His words are meaningless.

His talk was completely nonsense.

This discussion is completely meaningless.

His meaningful gaze made me uneasy.

He is majoring in semantics at university.

He was attacked personally.

He keeps an attack dog to protect his house.

He has a very aggressive personality.

The enemy army plans to launch a full-scale attack tomorrow night.

We plan to launch a full-scale attack on the enemy's base tomorrow.