The term 'very capable' can be described by two crossword solutions: 'EFFICIENT' (9 letters) and 'ADEPT' (5 letters). EFFICIENT means to be able to accomplish a task quickly and with minimal effort, while ADEPT implies having a high level of skill or knowledge in a particular area. Together, these two words suggest that someone is very capable, meaning they are both highly skilled and able to complete tasks quickly and easily.