professional
In Sanskrit, the word for expert is "कुशल" (kushala).
Authority can be used as another word for expert and starts with an "A". Example: An authority on the subject of crime, notes that...
Demolistionist
Professional
professional
expert
Consultant, clinic, expert, practitioner, specialist.
able, adroit, accomplished, proficient, skilled, expert
Moving Associate?
No. Inept (meaning 'not good at') is the opposite of adept (meaning 'good at'). Other words for expert would be professional, adroit, masterful.
A maven is another word for an expert. Therefore, possible antonyms would include a beginner, student or apprentice.
The latin word for Expert is "artis".