Incapable/ɪnˈkeɪpəbl/ Definition 1 of 3Pro Tip 1/3Emotional Weight Incapable often carries a suggestion of failure or deficiency. After many tries, he felt incapable of success. Pro Tip 2/3Personal Limitations Use it to describe a person's limits without specifying a reason. They're incapable of carrying heavy weights. Pro Tip 3/3Emphasizes Inability Highlight someone's inability in a specific situation. He's incapable of committing to any plan.