The study was conducted to identify and create a linguistic recording of the morphosemantic features of Tausug Inflection. Discourse analysis was employed to identify the structure, meaning, and usage of Tausug Inflection. Moreover, this research utilized a phenomenological approach to explore how the Tausug natives preserve their language and their insights on the importance of the language in their cultural identity. This approach was conducted through in-depth interviews and focus group discussions among 14 Tausug participants. Seven of them were for in-depth interviews, and the other seven were for focus group discussion. Findings revealed that there were five Tausug Inflections commonly used by the participants. These inflections were -um, -im, -nag, -mag, and -ma. Moreover, there were five major themes emerged on how the Tausug people preserve their language. These were used at home, used in written and online communication, used during occasions, shared with other cultures, and encouraged proper usage in Masjid. Lastly, there were four major themes revealed on the insights of the Tausug people on the importance of the language in their cultural identity. These were deeply rooted in the culture, sense of cultural pride, language conflict during a conversation, and the importance of research for preservation.