ascend  
verb  formal uk/əˈsend/ us/əˈsend/
  (GO UP)      
  [ I or T ]上升;攀登;登上 
to move up or climb something
  They slowly ascended the steep path up the mountain. 他们沿着陡峭的山路缓缓向上攀登。 
 There's a long flight of steps ascending (= leading up) to the cathedral doors. 要往上走很长一段台阶才能到达大教堂的门前。 
   (HIGHER POSITION)      
 [ I ]登上高的职位;升级,晋级 
to rise to a position of higher rank
  He eventually ascended to the position of chief executive. 他最终登上了总裁的宝座。 
 Idiom  
ascend the throneidiom  登上王位,登基
to become queen or king