The word "feasible" is spelled with a "s" which is pronounced as /ˈfiːzəb(ə)l/. This means that the correct spelling of "de feasible" should be "the feasible". The pronunciation of "the" is /ðə/ or /ði/, depending on the following sound. "Feasible" is often confused with "feasibly" which has a different meaning and is pronounced /ˈfiːzəbli/. Correct spelling and pronunciation are important in order to effectively communicate ideas and avoid confusion.