sidelong
adjective /ˈsaɪdlɒŋ/
  /ˈsaɪdlɔːŋ/
[only before noun]- (of a look目光 侧眼偷看的;斜着眼看的;睨视的 - She cast a sidelong glance at Eric to see if he had noticed her blunder.她偷偷斜扫了埃里克一眼,看他有没有留意到她的错误。 
 Collocations DictionarySidelong is used with these nouns:- glance
 词源late Middle English: alteration of earlier sideling, from side + the adverbial suffix -ling.
- She cast a sidelong glance at Eric to see if he had noticed her blunder.