IPA: /əˈkɒmplɪʃt/
KK: /əˈkɑmplɪʃt/
Having a high level of skill or expertise in a particular area, often due to practice and experience. It can also refer to someone who is polished and refined in their manners or social skills.
She is an accomplished musician, known for her exceptional talent and performances.
Accomplished is formed from "ac-" (a variant of "ad-", meaning to) and "complere" (meaning to fill up or complete). The word describes someone who has been filled up with skills or achievements, thus indicating a high level of proficiency or success.
Think of someone who has been 'filled up' with skills and achievements — that's what it means to be accomplished.