Daily Chinese Idiom Guessing Game
To become even more extreme or severe than before; to intensify.
厉猛烈。指比原来更加发展。现指情况变得比本来更加严重。
南朝·梁·萧统《文选·序》盖踵其事而增华，变其本而加厉，物既有之，文亦宜然。”
His procrastination started as a minor delay but has since become worse, now affecting his entire schedule.