1. not capable of being put into practice or made to function successfully

Examples

• The proposed budget cuts proved unworkable and had to be revised.
• His plan to finish the project in one day was completely unworkable.
• The committee rejected the unworkable solution.
• The new policy turned out to be unworkable in practice.
• They abandoned the unworkable schedule after the first week.
• The merger was deemed unworkable due to regulatory issues.