Abstract: Verbal derivation by suffixation is a familiar trait of the classical Bantu languages; it serves to change the orientation of the verb, or the number and roles of its arguments. In the present article it is shown that in Ktikila (B77a) strong phonological constraints, linked to the presence of a stress-accent on the root initial, have resulted in the loss of all productive verbal derivational morphology. Frozen relics of the old morphology remain in the form of pairs of verbs which are systematically related both in form and in sense, but the members of these pairs have undergone phonological changes which have obscured the relationship between them and made it impossible to segment the original suffixes. The syntax of the languag...