Difficult to deal with, overcome, or refute; reliable, certain, convincing. Now U.S. colloquial.
| 单词 | θ86765 |
| 释义 | the world > action or operation > difficulty > types of difficulty > [adjective] > difficult or formidable (2) strengthyc1520 Difficult to deal with, overcome, or refute; reliable, certain, convincing. Now U.S. colloquial. formidable1665 Const. to. |
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