unthinkableadj.
英 ʌn'θɪŋkəb(ə)l | 美 ʌn'θɪŋkəbl
中文adj. 不能想象的；过分的
词根词源
unthinkable (adj.)early 15c., "too large to be conceived, unimaginable," from un- (1) "not" + think (v.) + -able. Meaning "incapable of being framed by thought" is recorded from mid-15c.
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