cov·ert·ly
adverb/ˈkʌvətli/, /ˈkəʊvɜːtli/
/ˈkəʊvɜːrtli/
(formal)- in a way that is secret or hidden, making it difficult to notice
秘密的；隐蔽的；暗中的 - She watched him covertly in the mirror.
她从镜子里偷偷地望着他。
- She watched him covertly in the mirror.