The word "NISS" is often spelled with four letters, but its pronunciation consists of only three sounds. In IPA phonetic transcription, "NISS" is represented as /nɪs/. The first two sounds, /n/ and /ɪ/, together make the "ni" sound. The final sound, /s/, is pronounced as "ss." This simple yet challenging word is often used as a surname, an acronym, or even as a brand name for outdoor clothing and equipment companies.