摘要:This study is aimed at (1) describing the process of word formation using al-ziyaadah and affixation in Bugis and Arabic, (2) revealing the meaning of al-ziyaadah and affixation in forming a word in Bugis and Arabic, and (3) analyzing the similarities and differences in substances produced by al-ziyaadah and affixations in Bugis and Arabic. The research applied the library research using a linguistic approach. The primary data was collected and identified through a textbook; then, the types of al-ziyaadah and the affixes in both languages were analyzed. The word forms that adhere to and have an affix were compared, and the final step is to make conclusions based on comparisons and explore some similarities and differences. This study results indicated that the process of word formation in Arabic through al-ziyaadah, namely, al-sawaabiq, al-hasyw, al-lawaahiq, and al-muzdawijah. Meanwhile, in the Bugis language, the process of word formation is through affixation. The types of affixes in the Buginese language are prefixes, infixes, suffixes, confixes, and affixes. The word formation process with al-ziyaadah and affixation is the same as al-sawaabiq and prefixes, al-hasyw and infix, al-lawaahiq and suffixes, and al-muzdawijah and confixes. Meanwhile, the combination of affixes only exists in the Buginese language. The formation of words through al-ziyaadah in Arabic and affixation in Bugis contain similarities and differences. The overall meaning produced by al-ziyaadah and affixation is ninety-eight meanings, al-ziyaadah generates thirty-six meanings, and affixations generate sixty-two meanings. This research could be a valuable reference for further researchers who want to study languages and prevent regional languages extinction in the modern era.