The word "disillusioniser" is spelled with two "l's" and two "s's". In IPA phonetic transcription, it is /ˌdɪs.ɪ.ˈluː.ʒə.naɪzər/. This word is derived from the noun "disillusionment," meaning the loss of faith or trust in something or someone. The suffix "-iser" is added to the base word "disillusion" to create a verb form. Thus, "disillusioniser" means to cause someone to lose their faith or trust in something or someone. While not commonly used, this word is still a valid and recognizable term.