IPA: /æˈsθɛtɪʃən/
KK: /æˈsθɛtɪʃən/
A person who is trained to provide beauty treatments such as facials, manicures, and pedicures, and who understands the principles of beauty and artistic expression.
She decided to become an aesthetician to help others feel beautiful and confident.
Aesthetician → It is formed from "aesthetic" (from Greek "aisthesis", meaning perception or sensation) and the suffix "-ian" (meaning relating to or one who). An aesthetician is someone who specializes in beauty treatments and the perception of beauty.
Think of 'aesthetic' relating to 'perception of beauty' and remember that an aesthetician is someone who works in the field of beauty.