Focus on the pronunciation of impulse
English definition of “impulse”
/ˈɪm·pʌls/ n [C/U] (DESIRE)
› a sudden, strong desire to do something: [+ to infinitive] I had this impulse to dye my hair red. › If you do something on impulse, you do it because you suddenly want to: [U] I bought this expensive sweater on impulse.