| 单词 | covert |
| 例句 | covert adjective •covert plans to sell arms:secret, furtive, clandestine, surreptitious, stealthy, cloak-and-dagger, hole-and-corner, backstairs, backroom, hidden, under-the-table, concealed, private, undercover, underground | informal hush-hush. ANT overt. |
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