DEF: Escherichia coli: a bacterium that can exist in food that has not been cooked enough and can cause serious illness or death.
E.coli
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DEF: to make something that is already bad even worse:EX: This attack will exacerbate the already tense relations between the two communities. […]
What you like more than something else. / She has no preference; any browser is fine
to make words or messages unclear and difficult to understand
Something that doesn’t cost too much money — you can buy it easily.