Goodness, what would my home economics teacher have said if she had heard me say 'hard-boil'?
Stir the mixture constantly over the fire until it reaches the hard-boil stage.
hard-boil some eggs and, while they are cooking, fry a large square slice of bread in butter to make a large crouton.
Stir constantly over a hot fire until it reaches the hard-boil stage.
A nationality and a kingdom were at stake there, and no more time to decide it in than it takes to hard-boil an egg.