reposar
rest
re-
again
+
pose
to place in position
+
-ar
verb suffix
Reposar means to rest and can be thought of as re-0 (again0) + pose1 (to place in position1) + -ar2 (verb2), implying to place oneself in a position again (to rest).
verb
  1. rest
    To rest or relax
    Después de comer, me gusta reposar un rato. // After eating, I like to rest for a while.
  2. settle
    To settle or sit (for liquids or solids)
    Deja reposar la mezcla por diez minutos antes de usarla. // Let the mixture settle for ten minutes before using it.