bummock

Definitions

1. A brewing of ale.
   Scotland, obsolete
2. A submerged, downward-projecting piece of ice.

Examples

“Q. Are there not October gales which often separate⟳ the bummocks of ice and allow⟳ ships to pass⟳ on! - A. Decidedly. I do not know⟳ what the direction of the wind was at the time, but if the wind was going from the land⟳, then he would[…]”

“The ice "bridge" which broke was formed of great bummocks of ice welded together at the foot of the great cataract, […]”

“The most important ice features are the frequency and extent of downward projections (bummocks and ice keels) from the underside of the ice canopy (pack⟳ ice and enclosed water areas from the point⟳ of view⟳ of the submariner)[…]”

CEFR level