Sentence:  Suppose it should not be done enough! Suppose it should break in turning out! Suppose somebody should have got over the wall of the back-yard, and stolen it, while they were merry with the goose—a supposition at which the two young Cratchits became <WSD>livid</WSD>! All sorts of horrors were supposed. 
Meaning of the word marked with <WSD> tags:  So angry that one turns pale; very angry; furious.