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smooth + noun
形容词作定语，修饰名词。
She has smooth skin.
她皮肤光滑。
光滑的；平滑的；平整的
先理解核心含义，再看它在真实句子里的用法。
光滑的；平滑的；平整的
having an even, regular surface that is not rough, bumpy, or grainy
She has smooth skin.
她皮肤光滑。
具有缺乏摩擦的质地。不粗糙。
Having a texture that lacks friction. Not rough.
没有困难、问题或意外后果或事件的。
Without difficulty, problems, or unexpected consequences or incidents.
平淡；油嘴滑舌。
Bland; glib.
流畅或无阻碍地流动或表达；不刺耳；流利。
Flowing or uttered without check, obstruction, or hesitation; not harsh; fluent.
The surface of the table is smooth and cool to the touch.
桌面光滑，摸起来凉凉的。
We had a smooth flight despite the windy weather.
尽管风很大，我们的飞行依然平稳顺利。
The singer's smooth voice charmed the audience.
那位歌手流畅的嗓音迷住了观众。
形容词作定语，修饰名词。
She has smooth skin.
她皮肤光滑。
形容词作表语，描述主语特征。
The surface is smooth.
表面很光滑。
比喻结构。
The fabric feels as smooth as silk.
这种布料摸起来像丝绸一样光滑。
形容词后接不定式，表示在某方面平滑。
The cream is smooth to apply.
这种面霜涂抹起来很顺滑。
Not this
The surface is smoothed.
Use this
The surface is smooth.
形容词和过去分词混淆：描述物体固有属性时应使用形容词 smooth，而过去分词 smoothed 表示被弄平滑的动作结果，通常不用于描述静态特征。中文“表面很平滑”对应英语形容词 smooth，而非表示被动完成的 smoothed。
Not this
He smoothened the wood before painting.
Use this
He smoothed the wood before painting.
动词形式过度泛化：smooth 已经是及物动词，无需额外添加后缀 -en。smoothen 虽存在但不符合英语常用习惯，尤其在描述“使光滑”时，标准且自然的用法是 smooth 而非 smoothen。中文“使光滑”直接对应动词 smooth。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
光滑的皮肤
She applied lotion to keep her skin smooth.
她涂了乳液以保持皮肤光滑。
平稳的行驶
The new suspension gives a very smooth ride.
新的悬挂系统使行驶非常平稳。
一帆风顺
Once we got the funding, it was smooth sailing.
我们一旦获得资金，就一帆风顺了。
光滑的表面
The table has a smooth surface that is easy to clean.
这张桌子表面光滑，容易清洁。
平稳过渡
The company ensured a smooth transition to the new software.
公司确保了向新软件的平稳过渡。
一帆风顺
After the initial difficulties, it was all smooth sailing.
在最初的困难之后，一切都一帆风顺。
圆滑的人
He's a real smooth operator, always getting what he wants.
他真是个圆滑的人，总能得到他想要的。
光滑如丝
The transition was as smooth as silk.
过渡如丝般顺滑。
你的那种爱可以如此顺滑。
The way she dances is smooth, just like the song says.
她跳舞的方式很流畅，就像歌里唱的那样。
他是个圆滑的操纵者，从金库里运作。
His smooth talk convinced everyone to agree.
他圆滑的谈吐说服了所有人同意。
发长 /uː/ 音 (如 food, boot)
Use smooth naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
smooth发音类似‘丝慕’，想象丝绸般光滑的表面。
语域：中性；典型环境：描述物体表面、质地等。通常用于日常用语，非常常见。
形容词比较级为smoother，最高级为smoothest。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.
Watch the sound change