hard-boil

When they have come to a hard boil, take them off, and when cool enough for your hand, squeeze them in the water.

Hard boil three eggs and soak one-half package gelatine five minutes and add to hot liquid.

Stir constantly over a hot fire until it reaches the hard boil stage.

Stir constantly over a hot fire until it reaches the hard-boil stage.

Stir the mixture constantly over the fire until it reaches the hard-boil stage.