Here's why and some options depending on your intended meaning:
* "Pure" is primarily an adjective: It describes a noun, like "pure water" or "pure intentions".
* To express the action of making something pure, you can use verbs like:
* Purify: This is the most common and direct verb. "The filter purifies the water."
* Cleanse: This implies removing impurities. "The ritual cleansed the temple."
* Refine: This suggests making something more pure or perfect. "The artist refined their technique."
* Refurbish: This refers to making something pure or new again. "The old house was refurbished."
* To express the idea of being pure, you can use verbs like:
* Be: "Her intentions were pure."
* Remain: "The air remained pure after the storm."
* Stay: "She stayed pure in her beliefs."
The best verb to use depends on the specific context and the action you want to convey.