depends the context ur looking for .. heres 1 example .. " hey.. relax, aint that bad " --> " hey .. relajate , no es tan malo" dunno if this is what ur looking for but i hope it helps .. good luck !

hey here you are a few words Vamos a tomar un "DESCANSO" Podríamos ir a "RELAJARNOS" un momento antes del examen. young people from Mexico says "Vamos a tomarnos un "BREAK(descanso)"

if you want say relax to someone Just say" TRANQUILIZATE" =) or "TRANQUILO" for guys, "TRANQUILA" for girls and "TRANQUILOS" for a lot of people

In Spain we use "relax" word too. But there are too many (because is a concept that the Spaniards do much use). You can say: descansar, reposar, relajar, "me voy a echar la siesta", "me voy a tomar el café", "me salgo a fumar el cigarro" (this two last very used at work)...

well the word Relax have a different uses for the colombian spanish check it: Relax is means.. to take control about something or to calm down(situation, myself) to take it easy(when you got a bad situation) to take a break(take a nap, or make an another hobbie) it´s a synonym for Chill out just like this... Relax!