pinnacle
n
1 small pointed ornament built on to a roof or buttress (屋顶或扶壁上的)小尖塔, 尖顶. =>illus at App 1 见附录1插图, page viii.
2 high pointed rock or mountain peak 尖锥形岩石; 山峰; 高峰.
3 (fig 比喻) highest point; peak 顶点; 顶峰
the pinnacle of one´s career, fame, success, etc 事业、 声誉、 成功等的顶峰.