forceful

A forceful person or action is one that shows strength and determination.

When people say something is forceful, they usually mean it's strongly made, like a loud voice or a firm hand. You might hear someone describe a good speech as "forceful" because the speaker was very convincing and persuasive. In this sense, being forceful means getting your point across clearly and confidently. You can also use the word to describe a person who is direct and assertive in their words and actions - they're not afraid to stand up for what they believe in or express themselves strongly.

Note: The adjective "forceful" can sometimes be used to describe something that's physically strong, like a forceful blow, but this meaning is less common.