Here are some English words derived from "fruct-":
* Fruit (the mature ovary of a flowering plant containing seeds)
* Fructose (a type of sugar found in fruits)
* Fructify (to bear fruit)
* Fruition (the state of being fulfilled or realized)
* Fructuous (productive, fruitful)
* Defructescent (losing fruits)
* Fruticulture (the cultivation of fruit)
* Infructescence (a cluster of fruits)
* Fructiferous (bearing fruit)
As you can see, the words derived from "fruct-" often relate to the concept of fruit, its production, or the enjoyment derived from it.