What is another word for look of disapproval?
Pronunciation: [lˈʊk ɒv dˌɪsɐpɹˈuːvə͡l] (IPA) 
The "look of disapproval" can be conveyed in many ways using different synonyms. A scowl, glare, frown, or sneer can all effectively convey this emotion. A stink-eye or dirty look are more informal ways to describe the same expression. A withering glance is a more subtle way to communicate disapproval, while a hard stare might convey a more intense level of displeasure. Displeased look, disapproving expression or an unimpressed gaze also describes the "look of disapproval". Regardless of the words used, the message is clear- this person is not pleased with what they are seeing or hearing.
