unbeknownstadv.

'ʌnbi'nəunst

中文adv. 不知地\nadj. 不知的

不知地

adj. 不知的

词根词源

unbeknownst (adj.)1833, vulgar formation from unbeknown (1630s). No clear reason for the -st, but since 19c. this has become the dominant form.

关键词

unbeknownst