IPA: /ˈɛkspɜrtli/
KK: /ˈɛkspɜrtli/
In a way that shows great skill or knowledge in a particular area.
She expertly handled the difficult situation with confidence.
Expertly → It is formed from "expert" (from Latin *expertus*, meaning experienced or skilled) and the suffix "-ly" (meaning in a manner of). The word "expertly" means in a skilled or experienced manner.
Think of someone who is 'skilled' ('expert') doing something 'in a manner' ('-ly') that shows their expertise.