The word "thadzi" is a Chichewa term that means "greeting" or "hello." The spelling of this word can be explained using the International Phonetic Alphabet (IPA). The first sound, /θ/, is a voiceless dental fricative, where the tongue is placed between the teeth and air is smoothly released. The second sound, /a/, is pronounced as "ah." Finally, the word ends with a voiced alveolar stop, /d/, where the tongue is quickly tapped against the gum ridge behind the upper front teeth.