Today's word - adept

Management executives of the future will have to be adept at cross-cultural troubleshooting.
Diversity in the Workplase - Business Communication in Action Lesson 4

The word, adapt, adept and adopt are confusing. Definitions of these words are followed,

adapt: v to change sth in order to make it suitable for a new use or situation
adept: v good at doing sth that is quite difficult
adopt: v to start to use a particular method or to show a particular attitude towards sb/sth