frown    ibitsingotsingo, ibisingosingo
(to ~ at) kunyinyirwa, kurāba igitsūre
En-En dictionary 
kurāba igitsure (-rāvye)   phr    1. to frown at, 2. to look at another in disapproval
kunyinyirwa (-nyinyiriwe)     v    to make face over something that tastes bad, to frown
ibisingosingo  4    frown, showing disapproval on one's face
ibitsingotsingo    4    frown, showing disapproval on one's face