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Proverb / Kotowaza

馬鹿に付ける薬は無い

ReadingばかにつけるくすりはないRomajibaka ni tsukeru kusuri wa nai

There is no cure for foolishness or stupidity.

There is no medicine to apply to a fool.

Quick Answer

There is no cure for foolishness or stupidity.

Literal Image
There is no medicine to apply to a fool.
Closest Equivalent
Stupid is as stupid does.
How to Use It
Used to express frustration or resignation regarding someone who repeats foolish behavior and seems incapable of change.

Meaning

While medicine can treat physical illnesses, it cannot fix a person's innate foolishness or their refusal to learn from experience. This expression is used when a person continues to make the same mistakes or act irrationally despite receiving advice or being warned multiple times.

Literal Image

There is no medicine to apply to a fool.

Equivalent Proverbs

01
Close✓ Reviewed

Stupid is as stupid does.

The English focus is on behavior defining character, whereas the Japanese focuses on the inability to fix the trait.

How to Use It

Used to express frustration or resignation regarding someone who repeats foolish behavior and seems incapable of change.

Tone

This is a blunt and critical expression that can be highly insulting; use with caution.

Examples

01

何度言っても同じ失敗を繰り返す。馬鹿に付ける薬は無いと嘆きたくなる。

No matter how many times I tell them, they keep making the same mistake. It makes me want to lament that there is no medicine for a fool.

Learning Notes

Key Vocabulary

Estimated LevelN3Confidence: High
Estimate, not an official JLPT list

The vocabulary is relatively simple, but the use of the verb 'tsukeru' for applying medicine and the idiomatic construction require intermediate knowledge.

馬鹿

ばか / baka

fool, idiot

付ける

つける / tsukeru

to apply (medicine/ointment)

くすり / kusuri

medicine

無い

ない / nai

does not exist, none

Usage Profile

CasualCritical

Usage note: This is an insulting phrase; avoid using it directly to someone unless you intend to be offensive.

Misread Risk

Do not use this in formal or professional settings as it is considered a very harsh judgment of character.

Search As

馬鹿に付ける薬は無いばかにつけるくすりはないbaka ni tsukeru kusuri wa naibakanitsukerukusuriwanaibaka-ni-tsukeru-kusuri-wa-nai馬鹿に付ける薬はない

Kanji in This Proverb

Related Proverbs

Similar馬鹿は死ななきゃ治らない

Origin

The proverb comes from the comparison between physical ailments and intellectual or behavioral folly. While illnesses have medicine that can be applied to treat them, there is no such remedy for curing a person's stupidity. It reflects a sense of lamentation over folly that is impossible to fix.

Index

Topics, Situations, and Tags

01

Topics

Human NatureSuccess and Failure
02

Situations

Criticize Carelessness
03

Tags

⚔️Life & General Wisdom⚠️Warnings & Caution

Source Note

Where did this entry get its data from? The reference links are listed below. To understand how to read this section, see Data Sources.

Published
2026-03-15
Updated
2026-05-08
Source 1: tomomi965.comSource 2: tomomi965.comAbout Data SourcesReport a Correction

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