Correct spelling for the English word "deperulation" is [diːpˌɜːɹuːlˈe͡ɪʃən], [diːpˌɜːɹuːlˈeɪʃən], [d_iː_p_ˌɜː_ɹ_uː_l_ˈeɪ_ʃ_ə_n] (IPA phonetic alphabet).
I apologize, but "deperulation" does not seem to be a recognized word in the English language. It is possible that it could be a rare or specialized term specific to a certain field or jargon. However, I am unable to provide a dictionary definition for a word that does not exist in mainstream dictionaries or linguistic resources.
If you have any additional information about the word or its context, I may be able to assist you further.