
Dogged
Intensity Emphasis
Use 'dogged' to emphasize strong and continuous effort, especially in difficult situations. 
Positively Stubborn
While 'stubborn' can be negative, 'dogged' is a positive form of stubbornness, implying admirable persistence. 
Challenge Context
'Dogged' is often used when someone persists in the face of challenges, not just in regular tasks. 