deceleration
acceleration
slowdown
delta-v
decelerate
slow down
retardation
deaden
velocity
cutback
slow-motion
underspeed
gradient
rapidity
pace
jerk
time
ease up
time dilation
allargando
waning
speedlessness
downsizing
milligal
de-escalate
sub-light
subrelativistic
Bethe formula
Bernoulli's principle
wane
speedometry
scalar
down
Lorentz-Fitzgerald contraction
rate
exponential decay
super-speed
spooldown
subexponential
hypoexponential
slack
bat
exponential return
subluminary
high
take down a notch
rarefaction
better
subluminally
retard
outbrake
sublumic
minor
Mach number
drop
overspeed
slowing
apparent magnitude
idling speed
loss
kilolight
ebb
ebbing
decrease
displacement
withering
Maxwellisation
decrement
cool down
subluminal
speed order
kine
hypervelocity
reduction
andantino
relativistic mass
submaximal
subvelocity
milligalileo
decelerated motion
mobile chicane
slim
uniformly decelerated motion
spindown
undermeasure
larghetto
Lorentz invariant