unprolific
/ʌnˈproʊlɪfɪk/Definitions
1. adjective
Not producing or capable of producing much; unfruitful or unproductive.
“The unprolific winter resulted in a poor harvest for many farmers.”
2. adjective
Not giving rise to or producing much in the way of ideas, results, or activity.
“The team’s unprolific season ended in disappointment for the fans.”