While the adverb 'nemwu', roughly equivalent to the intensifier 'too' in English, has been considered an adverb that intensifies gradable predicates in excess, thereby provoking a negative interpretation, it can also be used to emphasize a positive evaluation in online subjective texts. Moreover, even in sentences conveying a negative evaluation, only some of the occurrences of nemwu are used as a polarity reversing valence shifter. This paper proposes a novel dichotomy for the uses of 'nemwu', consisting of ‘Intensifying Adverbs’ (IAs) and ‘Opinion Introducers’ (OIs), and examines the necessary contexts for determining the function of the adverb.