tián​nì

sugary and greasy

甜腻 甜膩 tián​nì
sugary and greasy
sweet and greasy; sugary and oily to the point of being cloying
sweet and smooth
sweet and smooth; sweet and delicate, as used to describe foods like chocolate or a gentle voice
overly sentimental
overly sweet or sentimental in a way that is unpleasant, such as excessive flattery