| Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993. |
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| unthinkable, thoughtless, unthinking (adjs.) |
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| Anything unthinkable is “inconceivable, impossible, too much”: That we wouldn’t attend was unthinkable. Unthinking means “without thought,” but more often it is a synonym of thoughtless, meaning “heedless or inconsiderate,” as in His unthinking [thoughtless] remarks hurt her feelings. All three words are Standard in these uses. | 1 |
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| | | The Columbia Guide to Standard American English. Copyright © 1993 Columbia University Press. |
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