1. not producing good or useful results; unsuccessful or ineffective
2. not producing fruit, crops, or offspring

Examples

• The negotiations proved unfruitful after three days of talks.
• Her search for a new job has been unfruitful so far.
• The unfruitful soil could not support the crops.
• Years of unfruitful research led the team to change their approach.
• The apple tree remained unfruitful despite careful tending.
• Their unfruitful marriage lasted only two years.
• The detective’s investigation was unfruitful until new evidence emerged.