Bad language, foul speech, or the use of vulgar, coarse, or obscene words; poor choice of words.
From Greek kakos (bad) and logos (word, language), with the suffix -logy forming a noun. It refers to the practice or study of bad language and vulgar speech.
Victorian scholars created whole hierarchies of language 'badness'—'cacology' was the academic term for cursing and vulgarity, which they found absolutely scandalous to even discuss.
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