1. very difficult to control, manage, or solve
2. refusing to be changed or improved

Examples

• The intractable problem of homelessness requires innovative solutions.
• Her intractable headaches did not respond to any medication.
• The intractable child refused to follow any classroom rules.
• Scientists are working on this intractable disease that has puzzled researchers for decades.
• The negotiations stalled due to intractable differences between the two parties.
• His intractable nature made him difficult to work with as a team member.