2 syllables: Vis, cous. Stress on Vis.
VIS-kuhs
/ˈvɪskəs/
Viscous is pronounced VIS-kuhs (/ˈvɪskəs/). It has two syllables (Vis-cous), with the stress on "Vis". Viscous is a slow-flowing, sticky liquid or substance. In science contexts it describes fluids with high internal friction, resisting flow. The word emphasizes thickness and stickiness, often used in reference to liquids like syrup or resin, and metaphorically to describe slow, inhibitive processes.
nounViscous is a slow-flowing, sticky liquid or substance. In science contexts it describes fluids with high internal friction, resisting flow. The word emphasizes thickness and stickiness, often used in reference to liquids like syrup or resin, and metaphorically to describe slow, inhibitive processes.
"The viscous syrup slowed the flow of the pancake batter as it dripped from the spoon."
"Oil with a viscous consistency helps protect engine parts by staying in place longer."
"The artist’s varnish became viscous in the cold room, requiring warmth to thin it."
You say VIS-kus, with stress on the first syllable. Phonetic: /ˈvɪs.kəs/. The initial 'vi' sounds like the short /ɪ/ in 'kit', followed by an /s/ cluster, and the final syllable is a relaxed /kəs/ with a schwa before s. Mouth position: lips relaxed, tongue high-mid front, teeth slight separation; the /k/ is a hard velar stop before the final /əs/. Listen for the crisp /v/ onset and the light, unstressed final -ous sound.
Common errors: (1) Treating the first vowel as a long /iː/ (viz. ‘vise-kous’) instead of /ɪ/; (2) Softening the final /s/ into /z/ or prolonging the /əs/ sound; (3) Dropping the /ɪ/ leading into /v/ to make /ˈviːskəs/. Correction: keep the /ɪ/ brief, clearly release /s/ before the /k/, and end with a short /əs/. Practice with minimal pairs: VIS-kus vs VISE-kus to feel the short vowel and crisp final consonant.
In US and UK, the initial /ˈvɪs/ remains consistent. US often retains a slightly more nasal /ɪ/ and crisper /s/, while UK may have a marginally shorter /ɪ/ and subtler /s/ before /k/. Australian speakers typically share the /ˈvɪs.kəs/ pattern but may produce a more centralized /ə/ in the final syllable, signaling a touch of /ə/ before /s/. Overall, rhoticity does not alter the word, but vowel quality and tenseness can vary subtly in non-rhotic vs rhotic accents.
The difficulty lies in the two-stressed structure and the compact consonant cluster /sv/ at the start, followed by a short, lax final syllable /kəs/. Learners may mispronounce the /ɪ/ as /iː/ or elongate the final /əs/. Focusing on a crisp /ˈvɪs/ onset and a quick release of /k/ into /əs/ helps. Practice by isolating each syllable (VIS - kus) and then blending with controlled tempo, using IPA as a guide.
Viscous emphasizes a clear, unstressed final syllable with a reduced vowel (schwa). Unlike words with obvious final stress, viscous keeps the final /əs/ light and short. The initial /v/ should be voiced and sharp, the /ɪ/ compact, and the /s/ soft but precise, before the hard /k/ release. Mute the tendency to pronounce as /ˈviːskəs/ and instead target /ˈvɪs.kəs/ for accuracy.
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Viscous comes from the Latin viscōsus, meaning ‘viscous, sticky, gluey,’ from viscum, ‘viscid, sticky substance’ and viscere, ‘to thicken, coagulate.’ The term entered English in the 17th century through scientific and medical discourse, originally describing thick, glue-like fluids. Its usage broadened to general descriptions of substances with high internal friction, resisting flow. The concept of viscosity as a measurable property grew with the development of fluid dynamics and rheology, influencing chemistry, physics, and engineering language. Over time, viscous evolved to describe both literal substances (oils, syrups, gels) and figurative contexts (slow, stubborn processes). The word’s early appearances were tied to laboratory notes and natural philosophy, later cementing its place in modern technical vocabularies and common description of sticky, thick textures in everyday discourse.
💡 Etymology tip: Understanding word origins can help you remember pronunciation patterns and recognize related words in the same language family.
Help others use "Viscous" correctly by contributing grammar tips, common mistakes, and context guidance.
💡 These words have similar meanings to "Viscous" and can often be used interchangeably.
🔄 These words have opposite meanings to "Viscous" and show contrast in usage.
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Words that rhyme with "Viscous"
-ous sounds
Practice with these rhyming pairs to improve your pronunciation consistency:
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