smooth

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smooth

  • /smuːð/

Rhymes with -uːð

Where it comes from

From Middle English smothe, smethe, from Old English smēþe, smōþ, both from Proto-West Germanic *smanþī, of unknown origin. Cognate with Scots smuith (“smooth”), Saterland Frisian smoud (“smooth”), Low German smood and smödig (“smooth, malleable, ductile”), Dutch smeuïg (“smooth”) (from earlier smeudig).

adjective smoother · smoothest · smeeth · smoothe

  1. Having a texture that lacks friction. Not rough. The outlines must be smooth, […]imperceptible to the touch, and even, without eminence or cavities.
  2. Without difficulty, problems, or unexpected consequences or incidents. We hope for a smooth transition to the new system.

    Similar: fluid, slick

  3. Bland; glib. This smooth discourse and mild behavior oft / Conceal a traitor.
  4. Flowing or uttered without check, obstruction, or hesitation; not harsh; fluent. the only smooth poet of those times

    Similar: seamless

  5. Suave; sophisticated. He was so smooth and handsome. He knew just what to say and when to say it.
  6. of an action Natural; unconstrained. In order for a reading to be smooth and effortless, readers must be able to recognize and read words accurately, automatically, and quickly.
  7. of a motion Unbroken. Demonstrate first by the numbers and then as one smooth movement.
  8. of water Placid, calm. As we worked to the southward, we picked up fair weather, and enjoyed smooth seas and pleasant skies.
  9. of an edge Lacking projections or indentations; not serrated. A leaf having a smooth margin, without teeth or indentations of any kind, is called entire.
  10. of food or drink Not grainy; having an even texture. A compact and stylish design, it produces 1 generous quart of excellent, smooth ice cream in 20 to 25 minutes.
  11. of a beverage Having a pleasantly rounded flavor; neither rough nor astringent. The coffee was smooth, so smooth she took another sip.
  12. of a function Having derivatives of all finite orders at all points within the function’s domain. Any ANALYTIC FUNCTION is smooth. But a smooth function is not necessarily analytic.
  13. of a number That factors completely into small prime numbers.
  14. of a vowel Lacking marked aspiration. Οὐ becomes οὐκ before a smooth vowel, and οὐχ before an aspirate.

    Similar: even

  15. of muscles Involuntary and non-striated.

Similar: downy, flat, frictionless, lanate, level, silken, silklike, silky, sleek, slight, smooth, velutinous, velvety · Opposite: rough, uneven, bumpy, coarse, textured

adverb smoother · smoothest · smeeth · smoothe

  1. Smoothly. smooth-running, smooth-tongued, smooth-spoken

noun smooths · smeeth · smoothe

  1. Something that is smooth, or that goes smoothly and easily. The smooth of his neck.
  2. A smoothing action. She brushes down her hair with a little bit of spit and a smooth of her hand and opens the bright green door, walking a few metres, squinting.
  3. A domestic animal having a smooth coat. In the 4-toe stock there is a wide gap between the lowest rough and the smooths which come from the same parents.
  4. A member of an anti-hippie fashion movement in 1970s Britain. By the early 1970s, skinhead culture began to mutate into the variant ‘white ethnic’ styles of the suedeheads and smooths.
  5. The analysis obtained through a smoothing procedure. A smooth of the potato data set has already been given in Figure 1.2.

verb smooths · smoothing · smoothed · smeeth · smoothe

  1. transitive To make smooth or even. She smooths her skirt, looking as composed and ladylike as possible.

    Similar: smoothen

  2. transitive To reduce to a particular shape or form by pressure; to press, to flatten. to smooth cloth with a smoothing iron
  3. transitive To make straightforward or easy. Caracas can be a tough place but the tremendously good-natured caraqueños smoothed my passage every step of the way.
  4. transitive To calm or palliate. to smooth a person's temper
  5. To capture important patterns in the data, while leaving out noise. […] the 7-month moving averages provide better smoothing of the data in this case than do the 3-month moving averages.
  6. West Country To stroke; especially to stroke an animal's fur. Can I smooth your cat?

Thesaurus

Closest in meaning: sleek, smooth out, smoothen, sinuate, slick, flowing, undulate, fluent, glossy, shine, satiny, marmorean, fast, easy, graceful, waxy

Translations

Every language

adj without difficulty

日本語スムース sumūsu
中文平穩 /平稳 píngwěn, 順利 /顺利 shùnlì
Kiswahililaini
Portuguêssuave
Françaisdoux, facile
Deutschreibungslos, problemlos, glatt
Italianofacile, dolce, soffice
Ελληνικάομαλός omalós
Русскийгла́дкий gládkij

adj bland; glib

Kiswahililaini
Portuguêssuave
Françaislisse
Deutschglatt
Italianoblando
Ελληνικάήπιος ípios

adj suave; sophisticated

Españolsofisticado
中文圓滑 /圆滑 yuánhuá
Kiswahililaini
Françaissophistiqué
Ελληνικάγλυκομίλητος glykomílitos

adj action: natural; unconstrained

中文流暢 /流畅 liúchàng, 自然 zìrán
Kiswahililaini
Portuguêssuave
Françaisnaturel
Ελληνικάστρωτός strotós

adj motion: unbroken

Españolconstante
中文流暢 /流畅 liúchàng
Kiswahililaini
Françaissouple
Ελληνικάομαλός omalós
Русскийпла́вный plávnyj

adj placid, calm

Españoltranquilo, apacible
中文平靜 /平静 píngjìng
Kiswahililaini
Ελληνικάακύμαντος akýmantos

adj edge: lacking projections or indentations; not serrated

Españolliso
Kiswahililaini
Portuguêsliso
Ελληνικάλείος leíos

adj food or drink: not grainy; having an even texture

Kiswahililaini

adj beverage: having a pleasantly rounded flavor; neither rough nor astringent

Españolsuave
Kiswahililaini
Portuguêssuave
Ελληνικάγλυκόπιοτος glykópiotos

adj mathematics, of a function: Having derivatives of all finite orders at all points within the function’s domain

Españolsuave
中文光滑 guānghuá
Kiswahililaini
Portuguêssuave
Françaisrégulier, lisse
Deutschglatt

adj lacking friction, not rough

Españolliso, glaxo, terso, suave
한국어매끄럽다 maekkeureopda
日本語滑らかな nameraka na
中文平滑 pínghuá, 光滑 guānghuá, guānghua
हिन्दीचिकना ciknā
Kiswahililaini
Portuguêsliso
Françaislisse
Deutschglatt
Italianoliscio, mellifluo
Ελληνικάλείος leíos, απαλός apalós
Românăneted, lin, lis
Русскийгла́дкий gládkij
Tiếng Việttrơn, mượt
العربيةنَاعِم nāʕim, أَمْلَس ʔamlas
עבריתחָלָק khalak

adj linguistics, classical studies, of a vowel: lacking marked aspiration

Kiswahililaini
Françaisdouce

noun something which is smooth or easy

Kiswahililaini

noun smoothing action

Kiswahililaini

noun domestic animal having a smooth coat

Kiswahililaini

noun member of an anti-hippie fashion movement in 1970s Britain

Kiswahililaini

noun statistics: analysis obtained through a smoothing procedure

Kiswahililaini

verb make smooth

Españolalisar
Kiswahililaini
Portuguêsalisar
Françaislisser
Deutschglätten
Ελληνικάλειαίνω leiaíno, εξομαλύνω exomalýno

verb statistics: capture important patterns in the data, while leaving out noise

Kiswahililaini
Françaislisser
Deutschglätten

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Cite this
MLA

"smooth." Wiktionary, via Micwyn, micwyn.com/word/smooth. Accessed 6 Nov. 2026.

APA

smooth. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/smooth

Chicago

"smooth." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/smooth.

BibTeX
@misc{smooth_2026,
  title = {smooth},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/smooth},
  urldate = {2026-11-06}
}