The grammar of Kasem is being analysed in terms of a hierarchical model (cf. Halliday, 1961; Bendor-Samuel, 1963), the (ascending) levels of relevance to this paper being word, phrase, clause, string, and sentence. (The ‘string’ is the unit which functions in the sentence and consists of a tightly bound sequence of clauses, the non-initial clauses operating under extensive restrictions with respect to their structure. This type of syntactic unit appears to be characteristic of many Gur languages and is often referred to as a ‘series’ or ‘serial construction’. For a recent discussion in some detail of this unit, under the term ‘clause clusters’, see Pike, 1966: 55–78.) At the word level in this hierarchy, a system of categories can be set up to account for the form of every verb word, i.e. so that every verb word can be completely ‘parsed’ or described in terms of these categories. But one of the characteristic features of this system of categories is that there is extensive neutralization between the categories. The question, then, that this paper seeks to discuss is this: are the ambiguities inherent in the verb word resolved within the language as a whole? An answer is here presented which seeks to relate the resolution of the ambiguities to the different levels of the grammatical hierarchy, as set up.