1. speed up

verb. Move faster.
Synonyms
quicken brisken accelerate deepen intensify brisk up speed brisk
Antonyms
decelerate sedate de-energize de-energise stifle
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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. 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))

7. 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))

8. 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))

9. up

adverb. (ˈʌp) Spatially or metaphorically from a lower to a higher position.
Synonyms
upwardly upward upwards
Antonyms
downwardly down downwards downward
Etymology
up (English)
upp (Old English (ca. 450-1100))

10. up

adjective. (ˈʌp) Being or moving higher in position or greater in some value; being above a former position or level.
Synonyms
upbound dormy leading risen skyward upward ascending ahead high aweigh dormie in the lead upfield heavenward sprouted
Antonyms
descending down low sober dejected
Etymology
up (English)
upp (Old English (ca. 450-1100))
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