uncertainadj.
英 ʌn'sɜːt(ə)n; -tɪn | 美 ʌn'sɝtn
中文adj. 无常的；含糊的；靠不住的；迟疑不决的
词根词源
uncertain (adj.)c. 1300, "of indeterminate time or occurrence," from un- (1) "not" + certain (adj.). Meaning "not fully confident" is recorded from late 14c. (implied in uncertainty). Related: Uncertainly.
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