hard frost

A hard frost set in, and, as soon as the ice bore thoroughly, skating became the order of the day.

Up, it being a snow and hard frost, and being up I did call up Sarah, who do go away to-day or to-morrow.

A very hard frost; which is news to us after having none almost these three years.

It was often calm at night, particularly in hard frost, but he felt as if something was going to happen.

No need now to tremble for the hard frost and the keen wind.