doughnut
noun (also donut especially in North American English)
ˈdəʊnʌt 
ˈdoʊnʌt a small cake made of fried dough, usually in the shape of a ring, or round and filled with jam/jelly, fruit, cream, etc.
Definition of doughnut noun from the Oxford Advanced Learner's Dictionary
ˈdəʊnʌt ˈdoʊnʌt 