 Semitransitive verbs can optionally be followed by an object noun phrase with indefinite reference; by contrast, transitive verbs are always interpreted to have a definite object.While most verbs are neutral with regard to the number of their arguments, some verbs can take only singular arguments and some (pluractional) verbs can only take non-singular arguments.For example, "mur", "tesi" and "medap" all mean "fall down", but only "medap" can have either a singular or a plural subject.