1. high-speed

adjective. (ˈhaɪˌspiːd) Operating at high speed.
Synonyms
high-velocity fast
Antonyms
slow gradual unhurried
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2. speed

noun. (ˈspiːd) Distance travelled per unit time.
Synonyms
muzzle velocity groundspeed light speed c steerageway terminal velocity rate hypervelocity angular velocity escape velocity peculiar velocity radial velocity velocity speed of light airspeed
Antonyms
overcharge discharge unburden empty negative charge
Etymology
speed (English)
spede (Middle English (1100-1500))
sped (Old English (ca. 450-1100))
speden (Middle English (1100-1500))
spedan (Old English (ca. 450-1100))

3. speed

noun. (ˈspiːd) A rate (usually rapid) at which something happens.
Synonyms
slow precipitation fastness hurriedness rate fast gradualness hastiness execution speed hurry swiftness graduality haste pace
Antonyms
slow fast advance fall follow
Etymology
speed (English)
spede (Middle English (1100-1500))
sped (Old English (ca. 450-1100))
speden (Middle English (1100-1500))
spedan (Old English (ca. 450-1100))

4. speed

verb. (ˈspiːd) Move fast.
Synonyms
hasten travel charge shoot down scoot bucket along pelt along go step on it push forward flash move buck shoot locomote hie dash barge rush thrust ahead race dart tear belt along scud cannonball along hotfoot rush along
Antonyms
stay in place linger no-go tasteful dullness
Etymology
speed (English)
spede (Middle English (1100-1500))
sped (Old English (ca. 450-1100))
speden (Middle English (1100-1500))
spedan (Old English (ca. 450-1100))

5. speed

noun. (ˈspiːd) Changing location rapidly.
Synonyms
move motion hurrying scudding acceleration scud speeding quickening speedup deceleration movement
Antonyms
acceleration deceleration refrain rise recede
Etymology
speed (English)
spede (Middle English (1100-1500))
sped (Old English (ca. 450-1100))
speden (Middle English (1100-1500))
spedan (Old English (ca. 450-1100))

6. demon

noun. (ˈdiːmən) An evil supernatural being.
Synonyms
daimon dibbuk evil spirit fiend devil succubus succuba dybbuk incubus daemon
Antonyms
eudemon please sane employer nonworker
Etymology
demon (English)
δαίμων (Ancient Greek (to 1453))
δαίω (Ancient Greek (to 1453))

7. speed

verb. (ˈspiːd) Move faster.
Synonyms
speed up quicken brisken accelerate deepen intensify brisk up brisk
Antonyms
decelerate positive charge disclaim credit arise
Etymology
speed (English)
spede (Middle English (1100-1500))
sped (Old English (ca. 450-1100))
speden (Middle English (1100-1500))
spedan (Old English (ca. 450-1100))

8. speed

verb. (ˈspiːd) Move very fast.
Synonyms
fleet move dart whizz flit travel locomote whizz along travel rapidly run zoom zoom along hurry go flutter zip
Antonyms
stay in place stay come enter malfunction
Etymology
speed (English)
spede (Middle English (1100-1500))
sped (Old English (ca. 450-1100))
speden (Middle English (1100-1500))
spedan (Old English (ca. 450-1100))

9. speed

verb. (ˈspiːd) Travel at an excessive or illegal velocity.
Synonyms
move travel locomote go
Antonyms
stay in place begin stop go off appear
Etymology
speed (English)
spede (Middle English (1100-1500))
sped (Old English (ca. 450-1100))
speden (Middle English (1100-1500))
spedan (Old English (ca. 450-1100))

10. speed

verb. (ˈspiːd) Cause to move faster.
Synonyms
speed up change accelerate alter modify
Antonyms
decelerate pay cash be born survive function
Etymology
speed (English)
spede (Middle English (1100-1500))
sped (Old English (ca. 450-1100))
speden (Middle English (1100-1500))
spedan (Old English (ca. 450-1100))
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