fruit·ful 
(frtfəl)
(frtfəl)adj.
1.
a. Producing fruit, especially in abundance.
b. Producing offspring, especially in abundance.
c. Capable of producing vegetation: fruitful soil.
2. Producing useful or desired results; productive: a fruitful collaboration; a fruitful suggestion. See Synonyms at fertile.
fruitful·ly adv.
fruitful·ness n.