you know; I tell you; emphatic sentence ending
Sentence-final casual particle that adds light force, confidence, or punch to a statement. It is familiar and often stereotypically masculine or rough, so it can sound inappropriate in polite or formal situations.
The curry at this place is really good, I tell you.
threatening sentence ending; ironic sentence ending; heh
At the end of a sentence, ぜ can make the speaker sound threatening, taunting, or ironically amused. The tone depends strongly on context and intonation.
We're going too, you know!
I'm leaving early tomorrow, you know.
If you get in my way again, you won't get away with it.
You've got some nerve saying that, after being late yesterday too.
You'll regret it, heh.
This is the real showdown, I tell you.
な can also end a sentence with casual emphasis or self-directed feeling, but it lacks the confident, assertive punch that ぜ carries.
Kana-only sentence-final particle used in casual speech; often has a masculine or rough flavor.
The historical derivation is uncertain. It is used as a colloquial sentence-final particle, conventionally written in kana.