Factional comes from faction + -al. Faction derives from Latin factionem ('a group, party, a doing'), from facere ('to do, make'). Morphologically, the account is both compositional and suffixal: -al marks the visible structure by which the older base becomes the modern form. In present use, it is used as an adjective meaning "relating to a self-interested faction within a larger group", so the historical material remains connected with the current sense rather than standing as bare ancestry. The wider English family includes derivatives such as factionalism and factionally and related forms such as faction and factious, showing how the same historical material continues to organize neighboring vocabulary. The named historical forms include Latin factio and Latin facere, keeping the history tied to concrete forms rather than a loose resemblance. Its semantic neighborhood is marked by partisan, sectarian, divisive, and schismatic on one side and contrasts such as unified, united, and cohesive on the other, locating the modern specialization without adding a new origin story.