a dogged scholar. She was not very clever, but by dogged effort she learnt a good deal at school.
It's dogged as does it
a.s. Dayan, başarırsın/Sebat et/işine dört elle sarıl.
dogged adherence to something: birşeye sımsıkı/dört elle sarılmak.
to meet with a dogged resistance: inatçı bir mukavemetle karşılaşmak.