Focus on the pronunciation of specialist
English definition of “specialist”
/ˈspeʃəlɪst/ noun [C]
› someone who has a lot of experience, knowledge, or skill in a particular subject or business area: specialist in sth She is a specialist in financial services and insurance.
› FINANCE, STOCK MARKET someone who works on a US stock market and buys and sells shares in particular types of companies: Specialists on regional exchanges sometimes have lower dealing costs than those in New York.