1N-UNCOUNT 庞大;巨大 If you refer to the enormity of something that you consider to be a problem or difficulty, you are referring to its very great size, extent, or seriousness. 庞大;巨大
I was numbed by the enormity of the responsibility. [+ of]
责任之大让我惊慌失措。
He was anxious about the enormity of the task ahead.