The word "more scintillescent" is a rare and complex word that is not commonly used in everyday vocabulary. It means "more sparkling or glittering." The spelling can be tricky to understand, but the phonetic transcription in IPA helps to break it down. The word is pronounced as "mɔr sɪntɪlɛsənt," with emphasis placed on the second syllable. It contains the suffix "-escent" which means "becoming" or "characterized by," while "scintill-" refers to a sparkling or twinkling effect.