A spice used to flavor food?

This is a bit of a trick question! There are many spices used to flavor food.

To give you a more helpful answer, I need a bit more information. Could you tell me:

* What kind of food are you thinking of? (e.g., Indian curry, Mexican salsa, Italian pasta sauce)

* What flavor profile are you looking for? (e.g., spicy, earthy, sweet, citrusy)

* Are you looking for a common spice or something more unique?

Once I know a little more, I can give you a more specific answer!