无声的英文：
noiseless
noiselessly
silent

参考例句：

To shut the mouth saying nothing
闭口无声

The soundless footsteps on the grass
草地上无声的脚步

the soundless footsteps on the grass(John Galsworthy.
草地上无声的脚步(约翰·高斯华西)

The creek, still and soundless, is closed in by trees, hidden from the eyes of men.
这条小港湾，静寂无声，树木环绕，简直是个世外桃源。

A voice, soundless yet perfectly real, said, You are safe now
一个无声而又十分真切的声音说到:现在你安全了。

Goro, marriage Pinkerton (mezzo-soprano); Cio-cio-san's child (silent)
五郎，媒人(男高音)巧巧桑的孩子(无声)。

He rose deliberately from his chair and came towards them across the soundless carpet.
他慢吞吞地从椅子上欠身站了起来，走过无声的地毯，向他们这边过来。

An unvoiced consonant
无声子音

A silent curse
无声的诅咒

silent mesh gearset
无声啮合齿轮组

noiseless是什么意思：
a. 无声的,寂静的

For him the wheel of slumber was wont to turn noiseless and slick and swift.
在他看来，时间在睡眠中总是过得很快，静悄悄地就溜走了。

At the next instant, a youthful warrior passed between them, with a noiseless step, and seated himself on the bank of the rapid stream
接着，一个年轻的战士脚步很轻地走过他们两人之间，在急湍的小河边坐了下来。

noiselessly是什么意思：
ad. 悄悄地;轻轻地

The river slid along noiselessly as a shade.
河水象幽灵一样无声无息地流过。

Stephen seated himself noiselessly before the princely presence
斯蒂芬一声不响地在亲王那幅仪表堂堂的肖

They often ate alone, conferred in pairs and groups, noiselessly read their papers or books, or went here and there in swiftly driven automobiles.
他们往往独自用餐，三三两两聚在一起平静地商量事情、看报、读书，或是乘坐疾驰的汽车到各处去。

silent是什么意思：
adj. 沉默的；寂静的；无记载的；不发音的
n. 无声电影

The slapstick comedy of silent films.
无声电影的滑稽趣味。

I represent the silent majority.
我代表沉默的大多数。

He motioned to me to be silent.
他示意我不要做声。