Kosher Beyond Food: Jewish Laws of Speech and Ethics

When most people hear the word "kosher," they immediately think of food. And that is understandable. Kosher dietary laws are one of the most visible aspects of Orthodox Jewish life. But if I could teach the world one thing about the word "kosher," it would be this: it is not only about what goes into your mouth. It is just as much about what comes out of it.

The word kosher actually means clean, proper, or fitting. You can have a kosher business deal. You can be a kosher person. You can have kosher thoughts. In the Orthodox Jewish world, these concepts are taken very seriously. In fact, I would argue that the laws governing speech are even more central to daily Jewish life than the laws of keeping a kosher kitchen, because you use your mouth to speak far more often than you use it to eat.

Lashon Hara: The Evil Tongue

The most well-known category of forbidden speech in Jewish law is lashon hara, which literally means "the evil tongue." And the definition might surprise you.

Lashon hara is not just lying about someone. It is speaking negatively about another person even when what you are saying is completely true. Let me repeat that, because it is important: even if every word is accurate, if it casts someone in a negative light, it is lashon hara and it is forbidden.

Think about that for a moment. In our culture, we are used to the idea that truth is a defense. "I was just telling the truth," people say. But in Torah law, truth is not a defense when it comes to damaging someone's reputation. If the information is negative and there is no constructive purpose in sharing it, keeping it to yourself is not just good advice. It is a Torah obligation.

The laws of lashon hara are incredibly detailed. The Chofetz Chaim, Rabbi Yisrael Meir Kagan, wrote an entire book on the subject (also called "Chofetz Chaim"), and it has become one of the most studied works in the Orthodox world. Many families have a daily study schedule where they learn two laws of lashon hara each day.

Some of the basic principles:

• You may not say something negative about someone to a third party
• You may not listen to lashon hara either (the listener bears responsibility too)
• You may not accept lashon hara as true, even if you hear it from a reliable source
• There are specific, limited exceptions for constructive purposes, such as warning someone about a dishonest business partner, but even these have strict conditions

Growing up, this was drilled into us. In my Bais Yaakov school, we had entire classes dedicated to the laws of proper speech. My teachers would give us scenarios: "Your friend asks you about a girl she is thinking of inviting to her birthday party. You know this girl can be difficult. What can you say?" These were not hypothetical exercises. They were training for real life.

Ona'as Devorim: Words That Wound

Beyond lashon hara, the Torah prohibits a category of speech called ona'as devorim, which translates to hurtful or oppressive words. This is about causing emotional pain through speech.

The Talmud takes this incredibly seriously. It teaches that embarrassing someone in public is akin to spilling their blood. The person's face drains of color (they turn white), and the shame they experience is compared to a kind of death. This is not metaphor. The rabbis mean it literally in terms of spiritual severity.

Ona'as devorim covers many situations:

• Reminding someone of their past. If a person has done teshuvah (repented) and changed their ways, you may not bring up their past mistakes.
• Giving misleading advice. If someone asks for your guidance and you deliberately steer them wrong, that is ona'as devorim.
• Asking the price of something you have no intention of buying. This wastes the seller's time and gives them false hope.
• Calling someone by a hurtful nickname. Even if everyone uses it, even if the person seems to accept it, if it causes them pain, it is forbidden.

I see how careful my community is about this, and it shapes the way people interact. There is a gentleness in how frum people speak to each other that comes directly from these laws.

Nivul Peh: Keeping Your Speech Clean

The third major category of speech ethics in Judaism is nivul peh, which means disgusting or vulgar speech. This includes:

• Profanity and curse words
• Crude jokes and humor in bad taste
• Sexually explicit language
• Any speech that degrades the dignity of human beings

The Torah commands us to be a holy people, and holiness extends to the words we choose. In Orthodox Jewish homes and schools, you simply do not hear foul language. Children are raised with an awareness that their mouths are instruments of kedusha (holiness), not tools for vulgarity.

This extends beyond just avoiding bad words. It is about cultivating a sensitivity to language. Speaking gently. Choosing words that build people up rather than tear them down. Using humor that is clever without being crude.

Rechilut: Gossip That Divides

Related to lashon hara is rechilut, which is tale-bearing or gossip. Even if what you are saying is not negative per se, if you are carrying information from one person to another in a way that could create conflict between them, that is rechilut.

For example: "You know what Sarah said about you?" Even if what Sarah said was relatively innocuous, the act of reporting it to someone who might be offended creates division. The Torah specifically prohibits this: "Do not go as a tale-bearer among your people" (Vayikra 19:16).

A Kosher Business, a Kosher Life

The concept of kosher extends beyond speech into every area of human conduct. A "kosher" business deal is one conducted with honesty, fair weights, transparent pricing, and no deception. A "kosher" person is someone who lives with integrity in all their dealings.

In the Orthodox world, how you conduct yourself in business is just as much a religious matter as how you keep Shabbat or what you eat for dinner. The Shabbat.31a">Talmud teaches that when a person comes before the Heavenly Court after death, the first question they are asked is not "Did you pray?" or "Did you keep kosher?" It is "Did you deal honestly in business?"

That should tell you something about Jewish priorities.

Why This Matters

I sometimes think that if the world adopted just these laws of speech, the amount of human suffering would decrease dramatically. Think about how much pain is caused by gossip, by hurtful words, by crude speech, by the casual destruction of someone's reputation.

In my community, children learn these laws from the time they can talk. It does not mean Orthodox Jews are perfect at it. We are human, and we struggle with these laws just like we struggle with every other challenge. But the awareness is there. The aspiration is there. And the constant study and practice of these laws creates a culture where speech is treated with the reverence it deserves.

Because in the end, the Torah teaches us something profound: the same mouth that prays to G-d, that teaches Torah, that says blessings over food, must also be a mouth that speaks with kindness, honesty, and dignity. That is what it means to truly be kosher.