| 词汇 | nonchalance |
| 词根词缀 | 词源： 1670s, from Fr. nonchalant, prp. of nonchaloir "be indifferent to, have no concern for" (13c.), from non- "not" + chaloir "have concern for," ultimately from L. calere "be hot" (see calorie). French chaland "customer, client" is of the same origin. |
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