Inactive Tutor answered 05/30/19
Latin cognates with English like Curriculum and Syllabus take the nominative plural form in Latin to indicate the plural in English. For example, Curriculum is a second declension neuter noun in Latin, so the nominative plural ends in -a, Curricula. Syllabus is a second declension masculine noun in Latin, so the nominative plural ends in -I, Syllabi. These Latin plurals then become the plurals in English as well.