The word "cerulific" is not commonly used in English, but its spelling can be explained using the International Phonetic Alphabet (IPA). The first syllable "ceru-" is pronounced as /'sɛru/, with the "e" pronounced as "eh" and the "u" as "oo". The second syllable "-lific" is pronounced as /'lɪfɪk/, with the "i" pronounced as "ih" and the "f" as "fuh". Together, the word "cerulific" means producing or resembling the color blue, and is derived from the Latin word "caerulus" meaning blue.
Producing a blue or sky colour.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.