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viscous + noun
viscous 常用于修饰名词，表示物质具有粘性。
The viscous liquid flowed slowly.
粘性液体流动缓慢。
粘稠的；粘性的
先理解核心含义，再看它在真实句子里的用法。
粘稠的；粘性的
having a relatively high resistance to flow
The viscous liquid flowed slowly.
粘性液体流动缓慢。
具有介于固体和液体之间的厚而粘稠的稠度(即高粘度)
Having a thick, sticky consistency between solid and liquid (that is, a high viscosity).
黏稠的,流动阻力大
having a relatively high resistance to flow
与粘度有关的
Of or pertaining to viscosity.
具有黏附性的
having the sticky properties of an adhesive
The cold honey is so viscous that it barely moves.
冷蜂蜜太黏稠，几乎不会流动。
Add water gradually, because the paint is too viscous to spread evenly.
要慢慢加水，因为这种涂料太黏稠，无法均匀涂开。
She poured the viscous syrup into the bottle and waited for it to settle.
她把黏稠的糖浆倒进瓶子里，等它慢慢沉淀。
viscous 常用于修饰名词，表示物质具有粘性。
The viscous liquid flowed slowly.
粘性液体流动缓慢。
作表语，描述主语的性质。
The honey is very viscous.
这蜂蜜非常粘稠。
用于表示状态变化。
The syrup gets viscous when cooled.
糖浆冷却后变得粘稠。
Not this
The viscous of the honey makes it hard to pour.
Use this
The viscosity of the honey makes it hard to pour.
错误是将形容词 "viscous" 误用作名词。汉语中常无词性变化，但英语中 "viscous" 是形容词，不能直接作主语或宾语，需用其名词形式 "viscosity"。
Not this
The liquid is very vicious.
Use this
The liquid is very viscous.
错误是混淆了拼写相近的 "vicious"（恶毒的）和 "viscous"（粘性的）。两者发音和拼写相似但意义不同，需根据语境选择正确词汇。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
粘稠液体
The honey became a thick, viscous liquid when heated.
蜂蜜加热后变成了浓稠的粘性液体。
粘性流体
This viscous fluid flows slowly through the pipe.
这种粘性流体在管道中流动得很慢。
非常粘稠的；高粘度的
The lava was so highly viscous that it barely moved.
熔岩粘度极高，几乎不动。
粘性阻力
Engineers must account for viscous drag in the design.
工程师在设计时必须考虑粘性阻力。
粘性材料
The machine is used to stir viscous materials.
这台机器用于搅拌粘性材料。
粘性流动；粘滞流动
Viscous flow occurs in materials like tar.
焦油这类材料中会出现粘性流动。
Use viscous naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆联想：看到（vis-）浓稠的蜂蜜慢慢流下，像胶水一样黏——viscous 即‘黏稠的’。
语域：formal 常见场景：科学/技术文献、物理或化学描述、正式书面语 通常用于科学或技术语境，多出现在正式书面语中；日常口语里表达“黏稠”时较少直接用该词，更常用 thick 或 sticky。
Sound matches (rhymes with viscous /ˈvɪskəs/): discus /ˈdɪskəs/, hibiscus /hɪˈbɪskəs/. Lookalikes that do not rhyme: vicious /ˈvɪʃəs/, conscious /ˈkɒnʃəs/, gracious /ˈɡreɪʃəs/ — the -cious ending sounds like /ʃəs/, not /skəs/.
Dictionary facts from ECDICT, WIKTIONARY.