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Use "sourer" in a sentence
"He made no reply, but turned and stared into the gray south-west with an expression sourer than any I had ever seen on his face."
"Women aren't disposed to sweeter tastes, or men to sourer, Bell says – the fact that we think they are is an element of our cultural story."
"The other staples in our rotation were oladi closer to buttermilk hotcakes, yet slightly sourer, wetter and smaller and blinchiki —thin pancakes akin to French crêpes, though less buttery."