1. surface-active agent

noun. A chemical agent capable of reducing the surface tension of a liquid in which it is dissolved.
Synonyms
emulsifier chemical agent surfactant detergent wetting agent wetter
Antonyms
adulterating
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2. surface

noun. (ˈsɝːfəs) The outer boundary of an artifact or a material layer constituting or resembling such a boundary.
Synonyms
bed board artifact level Mobius strip side mitre vertical surface artefact screen tread spandrel superficies ground skin plaster gameboard spandril plasterwork horizontal surface Klein bottle face projection screen silver screen miter work surface meniscus
Antonyms
natural object small large smallness unsized

3. surface

noun. (ˈsɝːfəs) The extended two-dimensional outer boundary of a three-dimensional object.
Synonyms
interior substrate interface firmament palate outside vault of heaven side wavefront hard palate celestial sphere bounds welkin empyrean photosphere boundary sphere roof of the mouth exterior bound heavens end face wave front inside substratum
Antonyms
inside outside start middle refrain

4. surface

noun. (ˈsɝːfəs) The outermost level of the land or sea.
Synonyms
body of water Earth's surface geosphere gap layer water lithosphere floor opening
Antonyms
imperfection soften nonmetallic kern take

5. surface

noun. (ˈsɝːfəs) A superficial aspect as opposed to the real nature of something.
Synonyms
facet aspect
Antonyms
victory defeat continue

6. surface

adjective. (ˈsɝːfəs) On the surface.
Synonyms
opencut opencast grade-constructed aboveground
Antonyms
subsurface overhead fatty undergarment undress

7. air

noun. (ˈɛr) A mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of.
Synonyms
atomic number 36 liquid air N Kr current of air atomic number 8 atomic number 7 krypton oxygen gas xenon Ne atomic number 54 O atomic number 18 Ar hot air argon breath atomic number 10 air current nitrogen wind Xe neon
Antonyms
let go of natural object straight line curve uncover
Etymology
air (English)
air (Middle English (1100-1500))
aeir (Anglo-Norman)

8. air

noun. (ˈɛr) The region above the ground.
Synonyms
part region
Antonyms
connect join stay
Etymology
air (English)
air (Middle English (1100-1500))
aeir (Anglo-Norman)

9. air

noun. (ˈɛr) A distinctive but intangible quality surrounding a person or thing.
Synonyms
quality atmosphere vibration note mystique aura vibe
Antonyms
uncoil stay in place lower untwine untune
Etymology
air (English)
air (Middle English (1100-1500))
aeir (Anglo-Norman)

10. air

noun. (ˈɛr) A slight wind (usually refreshing).
Synonyms
gentle wind light air air current strong breeze moderate breeze breeze light breeze sea breeze current of air wind fresh breeze gentle breeze breath zephyr
Antonyms
attach unify arrive stand still wholly
Etymology
air (English)
air (Middle English (1100-1500))
aeir (Anglo-Norman)
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