Which word? Defintion: continuing to do something or to try to do something even though it is difficult or other people want you to stop (OR) continuing beyond the usual, expected, or normal time : not stopping or going away // Examples: We were nagged by a ___________ salesman. He is one of the government's most _____________ critics. He has been fighting a ______________ cold/infection. Flooding has been a _____________ problem in the area this year.