calve

To give birth to a calf.

The farmer could tell Bessie was about to calve.

To assist in a cow’s giving birth to a calf.

The farmer calved Bessie for almost two hours.

To give birth to (a calf).

To shed a large piece, e.g. an iceberg or a smaller block of ice (coming off an iceberg).

The glacier was starting to calve even as we watched.

To break off.

The sea was dangerous because of icebergs calving off the nearby glacier.