all the

all the (2)  {adv. phr.}
Than otherwise; even. — Used to emphasize comparative adjectives, adverbs, and nouns.
Opening the windows made it all the hotter.
Take a bus instead of walking and get home all the sooner.
If you don't eat your dessert, all the more for us.
Categories: adverb
Source: A Dictionary of American Idioms

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