Japanese by Example
Learning through examples in manga

Don't worry with すんな

Manga panel from 俺物語!! showing example of Don't worry with すんな.
俺物語!! » Volume 6 » Page 56

Takeo takes his pregnant mother to the hospital, as she’s getting close to delivery. Once there, she gives Takeo and his friend Suna a list of things to take care of during her stay.

(かあ)さん:
大丈夫(だいじょうぶ)から心配(しんぱい)すんな
“I'll be fine, so don't worry.”

Key Points

  1. すんな = contraction of するな (“don’t do”)
    • すんな is a casual spoken contraction of するな (the prohibitive form: “don’t do X”)
    • The full form here would be: 心配(しんぱい)するな → “Don’t worry”
    • Pattern: 〜る + な → 〜んな (drop る, add んな)
  2. Why this contraction sounds casual
    • The prohibitive itself is already informal/casual (more direct than ないで)
    • The contraction 〜んな makes it even more colloquial and abrupt
    • Common in everyday speech, especially among family or close friends
  3. 心配(しんぱい)する = “to worry”
    • 心配(しんぱい) means “worry” or “concern” (noun)
    • 心配(しんぱい)する turns it into a verb: “to worry”
    • Other examples: 勉強(べんきょう)する (“to study”), 準備(じゅんび)する (“to prepare”)
  4. から adds reasoning
    • 大丈夫(だいじょうぶ)だから = “because I’ll be fine”
    • The から connects the reason to the command that follows
    • “I’ll be fine, so (therefore) don’t worry”

See Also