Focus on the pronunciation of illusion
English definition of “illusion”
/ɪˈlu·ʒən/ n [C]
› an idea or belief that is not true, or something that is not what it seems to be: We have no illusions about how difficult the job will be. [+ that clause] I was under the illusion that trains ran frequently on weekends (= I wrongly believed this). They managed to create the illusion of space in a tiny apartment. illusory
/ɪˈlu·sə·ri/, /-zə·ri/ adj › Her fears were illusory.