| 单词 | ungrateful |
| 释义 | Word Frequency ungrateful(ʌnˈɡreɪtfʊl) adjective 1. not grateful or thankful 2. unrewarding or unpleasant; thankless 3. (of land) failing to increase fertility in response to cultivation Derived forms ungratefully (unˈgratefully) adverb ungratefulness (unˈgratefulness) noun |
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