3 letter combinations that do not exist in the English language?

You're asking for a tricky thing! While there are many letter combinations that aren't common words, it's tough to say definitively that they "don't exist" in the English language. Here's why:

* Proper Nouns: Think of names like "Qxz" or "Bgh". While not common, they could be someone's name!

* Technical Terms: Science, medicine, or specialized fields could have unique combinations.

* Slang/Jargon: New words are always emerging. A group of friends might invent their own term.

However, here are three letter combinations that are VERY unlikely to be found in standard English words:

1. Qxy - The letter "q" almost always precedes "u" in English, and the combination "xy" is extremely rare.

2. Xzb - Similar to the first example, the "x" and "z" together are very uncommon, and "zb" is even rarer.

3. Vth - While "th" is a common sound, "v" rarely precedes it in English words.

Let me know if you'd like to explore other interesting letter combinations!