unconcerned
adj.
1630s, from un-(1) "not" + past participle of concern, v.. Related: Unconcernedly.
| 词汇 | unconcerned |
| 词根词缀 | Online Etymology Dictionary unconcerned adj. 1630s, from un-(1) "not" + past participle of concern, v.. Related: Unconcernedly. |
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