Focus on the pronunciation of substitute
English definition of “substitute”
/ˈsʌb·stɪˌtut/ v [I/T]
› to use someone or something instead of another person or thing: [T] You can substitute oil for butter in this recipe. [I] He was called on to substitute for the ailing star last night. substitute
/ˈsʌb·stɪˌtut/ n [C] › Talk is a poor substitute for action.