calve vs fall to bits

to break off 

to shed (a large piece, e.g. an iceberg); to set loose (a mass of ice), e.g. a block of ice (coming off an iceberg) 

to give birth to (a calf) 

to assist in a cow's giving birth to a calf 

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

to give birth to a calf 

To fall apart.