单词 unbeknownst 释义 unbeknownst, a. or adv. Orig. colloq. and dial.Also unbeknowns, etc.[f. prec. The analogy on which the -s or -st has been added is not clear: cf. the earlier unknownst.]= unbeknown 2. Also, = unbeknown ppl. a. 1.Now of much wider cu...