The word "Tranzillency" is spelled with a "tz" instead of "ss" to reflect its pronunciation. It is pronounced as /trænˈzilənsi/ with the stress on the second syllable. The "z" sound represents the voiced consonant sound in between the two syllables, whereas the "ss" would represent an unvoiced consonant sound. The word means transparency or clarity, and is used to describe how clear something appears. Good spelling is important to effectively communicate meaning and ideas.