Why does "slow down" and "slow up" mean the same thing?

Question

Why does flammable and inflammable mean the same thing?

because they're both flammable, none of them is up nor down, right?

hehehehe
( " _, )

Answer 1

If you are taking an elevator or Stairways then they are not the same, are they now?

Answer 2

Flammable and inflammable are not synonymous. The first means that an item can be ignited or can catch fire; the second means an item is virtually fire-proof.

Answer 3

Why does flammable and inflammable mean the same thing?
.

Answer 4

why does flammable and inflammable mean the same thing? go figure

Answer 5

It depends on the circumstance.

English is a nonsense language.

That's why you can spell FISH,
GHOTI
enouGH, wOmen, naTIon,

Slow down is more often correct.

You slow down when driving by a school.

You slow up the assembly line by being lazy.

The later is rarely used.

But you can say "I slow up traffic when I slow down to pass the school."

Answer 6

Slow up, slow down just one of the many quirks of the English language.

Answer 7

I don't use slow up.

I always use slow down.

However, direction of up or down, does seem irrelevant in a spherical world, circling on its axis. Which is up and down?

Answer 8

Philippines?

Answer 9

I've never used "slow up". I always thought that particular phrase was grammatically incorrect. :D

Answer 10

because it's all about SLOW, up&down, same thing? i dont know!