Formatives
Bantu languages are agglutinative — words are constructed by combining discrete formatives (a.k.a. "morphemes") according to specific rules, and sentences are constructed by stringing together words according to somewhat less strict rules. Formatives alone cannot constitute words; formatives are the component parts of words.
These formatives may be classed generally into roots, stems, prefixes, concords, suffixes, verbal auxiliaries, enclitics, and proclitics.
Read more about this topic: Sotho Grammar