frug-, fruct-

(Latin: fruit; from Old French fruit, from Latin fructus, "fruit, produce, profit" from frug-, stem of frui, "to use, to enjoy".)

usufruct
1. The right to use and enjoy the profits and advantages of something belonging to another as long as the property is not damaged or altered in any way.
2. The right of using and enjoying the profits of an estate or other thing belonging to another, without impairing the substance.
3. A legal term describing a situation wherein a person or company has a temporary right to use and derive income from someone else's property (provided that it isn't damaged).
usufructuary
1. Someone who is entitled by usufruct to the use of another person's property.
2. Of or relating to the nature of a usufruct.
3. Someone who holds property by usufruct.