The term 'quite capable' can be broken down into three crossword solutions: ABLE (4 letters), ADEPT (5 letters), and welluptothetask (15 letters). ABLE is an adjective meaning having the power, skill, means, or opportunity to do something. ADEPT is an adjective meaning having or showing knowledge, skill, or aptitude in a particular field or activity. Welluptothetask is an adjective meaning having the ability to do something successfully. Together, these three words describe someone who is quite capable, meaning they have the power, skill, and aptitude to do something successfully.