Causative constructions have been observed to have an iconic relationship between form and meaning. In Nepali, the citation form of a verb ends in "-nu." By inserting the morpheme "-au" before "-nu," one can change the verbs into corresponding causative verbs. In addition, Nepali has several causative verbs that form periphrastic causative constructions. Analysis of the syntax and semantics of the major causative constructions in Nepali suggests an implicational scale ranging six causative constructions in terms of the realization of effect from the strongest to the weakest: lexical (e.g., "maar-nu"), morphological "-(au"), periphrastic causative ("lagau-nu, banau-nu, garau-nu, and di-nu"). It can be concluded that the iconic relationship between the structural integration of causative constructions on one hand and the conceptual encapsulation of cause and effect on the other does occur in this language. (MSE)