Can the word no be used to start a sentence?

Yes, the word "no" can definitely be used to start a sentence. It's quite common in spoken language and informal writing, especially in situations where you're expressing disagreement, denial, or a strong negative response.

Here are some examples:

* No, I don't want to go to the movies tonight.

* No, that's not what I meant.

* No way, I'm not going to eat that!

While it's generally acceptable, you might want to consider the context and tone of your writing. In formal writing, starting a sentence with "no" might be considered too abrupt or informal.

However, even in formal writing, there are exceptions where using "no" at the beginning of a sentence is acceptable, such as in a direct quote or a sentence emphasizing strong negation.