tacit

adj. 缄默的；不言而喻的；心照不宣的；默许的

中文词源

tacit 安静的，心照不宣的，默许的

来自拉丁语 tacere,安静，来自 PIE*tak,使安静，词源同 tacet.引申词义默许的等。

tacit: tacit: [17] Tacit was adapted from Latin tacitus, the past participle of tacēre ‘be silent’. Another derivative of this was Latin taciturnus, from which English gets taciturn [18]; and tacēre also lies behind English reticent.
=> reticent, taciturn
tacit (adj.): c. 1600, "silent, unspoken," from French tacite and directly from Latin tacitus "that is passed over in silence, done without words, assumed as a matter of course, silent," past participle of tacere "be silent, not speak," from suffixed form of PIE root *tak- "to be silent" (cognates: Gothic þahan, Old Norse þegja "to be silent," Old Norse þagna "to grow dumb," Old Saxon thagian, Old High German dagen "to be silent"). The musical instruction tacet is the 3rd person present singular of the Latin verb. Related: Tacitly.

音：叹息的，叹息一声，陷入沉默，彼此心照不宣2. 谐音“太息的”-----长太息以掩涕兮，哀民生之多艰。

1. The rebels enjoyed the tacit support of elements in the army.: 反叛分子得到了军队中部分势力的暗中支持。

4. The question was a tacit admission that a mistake had indeed been made.: 问这个问题实际上等于默认确实出了差错。

5. By tacit agreement , Clark's friends all avoided any mention of his mentally ill wife.: 克拉克的朋友们心照不宣, 绝口不提他那位患精神病的妻子.