Focus on the pronunciation of expertise
English definition of “expertise”
/ˌekspɜːˈtiːz/ noun [U]
› a high level of knowledge or skill: pick up/gain/develop expertise I've been in this job for thirty years, and I've picked up a good deal of expertise along the way.expertise in sth He is a logical choice given his expertise in consumer marketing. specialist/technical/professional expertise engineering/management/design expertisethe expertise to do sth You will need someone with the expertise to handle confusing technical regulations. The problem comes when a manager strays outside his area of expertise.