Which term is used to mean to hinder or prevent something?

The term "deter" specifically means to hinder or prevent something from occurring. It is often used in contexts where actions or strategies are implemented to discourage a certain behavior or outcome. For example, law enforcement may implement certain measures to deter criminal activity, meaning they aim to make it less likely to happen.

On the other hand, the other terms do not convey this specific meaning. "Diligent" refers to showing care and effort in one's work or duties, "derive" relates to obtaining something from a specified source, and "dilute" means to make a liquid thinner or weaker by adding water or another substance, which does not align with the idea of hindrance or prevention. Therefore, "deter" is the most appropriate choice for the meaning of hindering or preventing something.