Question

Four words that means the same as slow

Answer 1

Sluggish, unhurried, steady, poky, leisurely.
:)

Answer 2

Depends on what context you need.

not quick or fast: unhurried, leisurely, sedate, sluggish

taking a long time: prolonged, lengthy, time-consuming

(of a person) not prompt to learn: unintelligent, witless, stupid

verb: decelerate, brake.

Hope this helps.