Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
depersonalisation is a noun meaning "emotional dissociative disorder in which there is loss of contact with your own personal reality accompanied by feelings of unreality and strangeness". It carries 3 recorded senses.
emotional dissociative disorder in which there is loss of contact with your own personal reality accompanied by feelings of unreality and strangeness
(existentialism) a loss of personal identity; a feeling of being an anonymous cog in an impersonal social machine
existentialism
representing a human being as a physical thing deprived of personal qualities or individuality
“according to Marx, treating labor as a commodity exemplified the reification of the individual”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for depersonalisation come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.