The spelling of the word "tsen" is derived from the phonetic transcription of the sound produced when pronouncing it. In IPA (International Phonetic Alphabet), the sound is represented as /t͡sɛn/ which consists of the voiceless alveolar affricate "ts" followed by the open-mid front unrounded vowel "e" and the voiced alveolar nasal "n". The sound "ts" is made by pressing the tip of the tongue against the ridge behind the upper front teeth while simultaneously releasing a burst of air. The correct spelling of "tsen" thus accurately represents its phonetic pronunciation.