| 单词 | arduous |
| 释义 | Word Frequency arduous(ˈɑːdjʊəs) adjective 1. requiring great physical or mental effort; difficult to accomplish; strenuous 2. hard to endure; harsh arduous conditions 3. hard to overcome or surmount; steep or difficult an arduous track Derived forms arduously (ˈarduously) adverb arduousness (ˈarduousness) noun Word origin C16: from Latin arduus steep, difficult |
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