As a noun:
* Meaning: Prestige, distinction, or the quality of being highly regarded.
* Example: "The restaurant has a cachet of exclusivity, attracting only the most discerning diners."
As a verb:
* Meaning: To mark or brand something (especially a product) with a distinctive mark, symbol, or seal.
* Example: "The company cached their products with a unique logo to differentiate them in the marketplace."
So, to determine the part of speech, you need to look at its usage in the context of the sentence.