| 单词 | unbeknown |
| 释义 | unbeknown /un'bi nohn"/, adj. unknown; unperceived; without one's knowledge (usually fol. by to). Also, unbeknownst /un'bi nohnst"/. [1630-40; UN-1 + beknown (late ME beknowe, ptp. of beknowen); see BE-, KNOWN] |
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