Redire
Il trouve toujours à redire = He is always finding fault.
Il n’y a rien à redire à cela = There is no fault to be found with that; That is quite all right.
Réflexion
Réflexion faite = After due reflection; On second thoughts.
Refrain
C’est le refrain de la ballade = It is the old story over again.
[“C’est toujours le refrain qu’ils font à leur ballade.”—Régnier, Sat. i.]
Refus
Cela n’est pas de refus (fam.) = That is very acceptable; I won’t say no to that.