stomach churning

دل به هم زن - مهوع - تهوع آور
( ترس و غیره ) دلشوره آور

causing a feeling of nausea or disgust

If you describe something as stomach - churning, you mean that it is so unpleasant that it makes you feel physically sick
دل آشوبه
احساس دل به هم خوردن
احساس تهوع داشتن
The stench from rotting food is stomach - churning
بوی غذای فاسد تهوع آور است.