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

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. surface

verb. (ˈsɝːfəs) Come to the surface.
Synonyms
rise ascend bubble up emerge rise up go up intumesce come up resurface swell well
Antonyms
descend unfasten unstratified leafless good

8. mail

verb. (ˈmeɪl) Send via the postal service.
Synonyms
pouch get off send out send
Antonyms
stay in place contraindicate rise ascend get on
Etymology
mail (English)
maille (Middle English (1100-1500))
maille (Old French (842-ca. 1400))
macula (Latin)
mal (Middle English (1100-1500))
male (Anglo-Norman)

9. mail

noun. (ˈmeɪl) The bags of letters and packages that are transported by the postal service.
Synonyms
express registered mail letter first class 1st-class mail special delivery express mail message airmail parcel post 1st class missive air mail third class third-class mail surface mail registered post bulk mail first-class mail
Antonyms
surface mail air mail fauna flora prosecution
Etymology
mail (English)
maille (Middle English (1100-1500))
maille (Old French (842-ca. 1400))
macula (Latin)
mal (Middle English (1100-1500))
male (Anglo-Norman)

10. mail

noun. (ˈmeɪl) The system whereby messages are transmitted via the post office.
Synonyms
airpost post snail mail airmail postal service communication rural free delivery mail service communicating RFD
Antonyms
e-mail email electronic mail dissuasion unconnectedness
Etymology
mail (English)
maille (Middle English (1100-1500))
maille (Old French (842-ca. 1400))
macula (Latin)
mal (Middle English (1100-1500))
male (Anglo-Norman)
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