1
be tacitly + past participle
此结构多为被动语态，表示某事未经明说却被默认接受。
The proposal was tacitly accepted by the committee.
这项提议被委员会默许了。
心照不宣地；默示地
先理解核心含义，再看它在真实句子里的用法。
心照不宣地；默示地
in a tacit manner; by unexpressed agreement
The proposal was tacitly accepted by the committee.
这项提议被委员会默许了。
指双方心照不宣，而非安静无声。
以默示方式；心照不宣地。
In a tacit manner; done in silence or implied.
Both sides tacitly agreed to stop the argument.
双方心照不宣地同意停止争吵。
She tacitly accepted the new office hours.
她默不作声地接受了新的办公时间。
He tacitly acknowledged his mistake.
他默默承认了自己的错误。
此结构多为被动语态，表示某事未经明说却被默认接受。
The proposal was tacitly accepted by the committee.
这项提议被委员会默许了。
后接名词或名词短语，强调双方心照不宣地达成一致。
They tacitly agreed to the new arrangement.
他们默许了新安排。
后接 that 从句，表示间接承认某事实。
She tacitly acknowledged that she had made a mistake.
她默认自己犯了错。
Not this
She gave tacitly approval to the plan.
Use this
She gave tacit approval to the plan.
tacitly 是副词，不能放在名词 approval 前作定语；应改用形容词 tacit。中文“默许的”对应形容词，不能受“沉默地”影响加 -ly。
Not this
She tacitly closed the door and left.
Use this
She silently closed the door and left.
tacitly 表示“心照不宣地、默示地”，指未用言语表达但彼此明白；表示“不出声地、安静地”应使用 silently。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
心照不宣地同意
They tacitly agreed to split the bill.
他们心照不宣地同意分摊账单。
默示地接受；默认
The company tacitly accepted the new working hours.
公司默示地接受了新的工作时间。
默示地承认
She tacitly acknowledged the truth by staying quiet.
她保持沉默，默示地承认了事实。
心照不宣地假定
We tacitly assumed that the meeting had been canceled.
我们心照不宣地假定会议已经取消了。
心照不宣的；不言而喻的
It is tacitly understood that all employees must dress professionally.
不言而喻，所有员工都必须穿着职业服装。
默许；默示地纵容
The school tacitly condoned the students' pranks.
学校默许了学生们的恶作剧。
Use tacitly naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记 tacitly：tacit（沉默）+ly，像两人对视点头，心照不宣，不必开口。
语域：formal 常见场景：正式书面语、法律或学术文本 tacitly 多用于正式或书面语境，表示“以默示方式；心照不宣地”，比 silently 更正式，日常口语中较少出现。
这些词中，explicitly、implicitly、illicitly 彼此押韵（重读元音 /ɪ/ + /sɪtli/），但它们的重音不在第一音节，所以都不与 tacitly /ˈtæsɪtlɪ/ 押韵；tacitly 的重读元音是 /æ/。placidly、rapidly、acidly 都与 tacitly 一样重读第一音节且带 /æ/，但都以 /ɪdli/ 结尾（d 而非 t），因此也不押韵。tacitly 没有常见的完全押韵词。
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY.