JLPT Level: N5
Meanings

Strong emphasis or assertion directed at others

Rough, masculine emphasis

Exclamatory marker for a bold statement

Usage

Verb (dictionary form) + ぞ

い-adjective (dictionary form) + ぞ

な-adjective + だ + ぞ

Noun + だ + ぞ

Explanation
ぞ is a sentence-ending particle used to add strong emphasis or assertiveness. It conveys a rough, masculine tone and is often heard among friends or in casual, forceful speech. It can express determination, warning, or bold statements. It should not be used in polite or formal contexts, and may sound abrasive to the listener if overused.
明日までにこれを終わらせろぞ!
あしたまでにこれをおわらせろぞ!

Finish this by tomorrow, I’m warning you!

ここは私のものだぞ。
ここはわたしのものだぞ。

This place is mine, you know.

彼は新しい仕事を見つけたぞ。
かれはあたらしいしごとをみつけたぞ。

He found a new job, (and I’m telling you) good for him.

そんなことをするなぞ、許されない。
そんなことをするなど、ゆるされない。

Doing such a thing is not allowed, period.

静かだぞ。
しずかだぞ。

Be quiet.

彼女は優しい人だぞ。
かのじょはやさしいひとだぞ。

She’s a kind person, you know.