Ichidan verb, Intransitive verb
to go to the top; to climb to the top; to ascend to the top; to reach the summit (e.g. of a mountain)
彼はその会社でたたき上げで最高の地位まで登りつめた。He rose through the ranks to the top position at the company where he started his career. to be engrossed in; to be very enthusiastic about; to be infatuated with
Also written 登り詰める【のぼりつめる】、昇り詰める【のぼりつめる】