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third-person singular simple present pejorates, present participle pejorating, simple past and past participle pejorated
(transitive, intransitive) To become or make (something) worse; to deteriorate, to worsen. quotations examples
You do not appear to me to recognize the gravity of your situation, or you would be more careful not to pejorate the same by words which glance upon the purity of justice.
1892, Robert Louis Stevenson, “Lord Advocate Prestongrange”, in Catriona, London, Edinburgh: Thomas Nelson & Sons, page 49