This article reports on the analysis of three major markers of necessity in Luganda, i.e. the modal auxiliaries -téekw-and -lina and the verbal prefix -andi-. On the basis a 4-million-word corpus it is argued that, overall, the auxiliary -téekw-is more established as a necessity marker, as it is involved in the expression of all necessity subcategories except participant-inherent dynamic necessity. The auxiliary -lina is less semantically diversified, expressing only participant-imposed, situational and deontic necessity, while the verbal prefix -andi-expresses only deontic necessity. A comparison of corpus data with data from older literature on Luganda further shows that the objective category of participant-inherent dynamic necessity, which is not associated with any of the three markers described, is perhaps expressed by less-grammaticalised forms. These forms are also, together with other grammaticalised forms that have increasingly become rare, assumed to be part of the devices that could have been responsible for expressing necessity in earlier stages of the language, given that the three markers described in this research have only begun to meaningfully express necessity since the second half of the 20th century.
Introduction: The rationale for studying the necessity markers -téekw-, -lina and -andi-The understanding of necessity adopted in this article is that it is one of the two major sub-domains of modality, the other being possibility (Palmer 1986: 20; van der Auwera and Plungian 1998: 80; Kratzer 2012: 28). We use the typology proposed by Nuyts (2006, see also Nuyts 2016), in which three types of necessity are recognised. Dynamic necessity concerns 'the indication of a need or necessity for the first-argument participant' (Nuyts 2006: 3). If the needs or necessities are fully inherent to the first-argument participant or subject, it is referred to as participant-inherent dynamic necessity. If the necessity is determined by external circumstances, it is participant-imposed dynamic necessity, and for necessities/inevitabilities inherent in the situation described in the state of affairs, it is called situational dynamic necessity. Deontic necessity is generally defined as an assessment of the degree of moral acceptability of the state of affairs, while epistemic necessity is concerned with a high likelihood or probability that the state of affairs expressed in the clause applies in the world.In (older) Luganda dictionaries, grammars and handbooks, a number of forms with meanings associated with the concept of 'necessity' can be identified. These forms, some of which are auxiliaries or auxiliary-like verbs, include -téekw-'must, be obliged, be bound', -étaag-'need, require, want, desire, crave, long for', -gwán(ír)-'ought, be expedient, be necessary, be obligatory, must, be fitting, be suitable, behove', -sáan(ir)-'ought, be behoved' and -lina 'have' (see O'Flaherty 1892;