刃岭

[ noun ]
a sharp narrow ridge found in rugged mountains
<noun.object>

Arete \A`r[^e]te"\, n. [F., lit., a sharp fish bone, ridge,
sharp edge, fr. L. arista beard of grain.] (Geog.)
An acute and rugged crest of a mountain range or a subsidiary
ridge between two mountain gorges.
[Webster 1913 Suppl.]