| 词汇 | unthinkable |
| 词根词缀 | 词源： 1430, "too large to be conceived, unimaginable," from un- (1) "not" + thinkable (see think). Meaning "incapable of being framed by thought" is recorded from c.1445. Unthinking "unreflecting" is attested from 1676. |
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