This is the 7430th most frequent Turkish word.
gitmekte
"Gitmekte" means "in the process of going" or "going."
In this sentence, 'gitmekte' is a gerund form expressing the action of 'going' as an object of the verb 'ısrar etmek' (to insist).
Kütüphaneye gitmekte ısrar ediyordu.
He insisted on going to the library.
Here, 'gitmekte' metaphorically means 'continuing' towards goals, showing determination in actions.
O, hedeflerine ulaşmakta kararlıdır.
They are determined in achieving their goals.
'Gitmekte' in this sentence is used in an infinitive construction, referring to the general act of 'going for walks'.