flawing

The -ing form works on both sides of the verb's split. Transitively it takes an object, as with frost flawing the marble or a careless cut flawing a stone. Intransitively it stands alone, as when a glaze is flawing, meaning cracking of its own accord. As a gerund it names the act itself: the flawing of a gem. It carries only the verb's sense of damage, never the obsolete noun's flake or thin cake of ice.