When it comes to describing a person's abilities or skills, there are many synonyms for the phrase "in capabilities". Some common alternatives include "lack of skills", "incompetence", "shortcomings", "deficiencies", "limitations", "weaknesses", "ineptitude", "incapacity", "inadequacy", "ineffectiveness", and "inexperience". It's important to keep in mind that using these words to describe someone's abilities can be seen as negative and even insulting. It's always best to focus on the positive aspects of a person's skills and try to help them improve in areas where they may struggle rather than focusing on their limitations.