unbeknown
/ˌʌnbɪˈnəʊn/(亦作unbeknownst /-ˈnəʊnst/)
adjective
predic.(unbeknown to)
- without the knowledge of (someone)不为所知的, 不知道的：
unbeknown to me, she made some enquiries.
在我不知道的情况下她作过调查。
词源
mid 17th cent.: from UN-1 'not' + archaic beknown 'known'.