re-

jälleen|alt=jälleen-, uudestaan again, anew
a completive or intensification of the base; up, a-, out
back, backward
puhekieltä with
puhekieltä they
indicates repetition, again
indicates a return to previous state, back
(l)
back, backwards
again; prefix added to various words to indicate an action being done again, or like the other usages indicated above under English.
(l) (gloss)

(prefixusex)

Can be used with adjectives to form a superlative e.g.:

rebueno = buenísimo, rechulo = chulísimo