Cornice: An overhanging mass of wind-drifted snow, ice or rock that forms a ledge that can break off and cause an avalanche.
(An overhanging mass of wind-drifted snow, ice or rock; forms; a ledge that can break off and cause an avalanche) (a ledge; can break off; ) (a ledge; cause; an avalanche)
An overhanging mass of wind-drifted snow, ice or rock a ledge a ledge
forms can break off cause
a ledge that can break off and cause an avalanche
an avalanche