Before you make any smooth moves on your date, acknowledge that some Hispanic daters may have traditional, stricter dating rules and expect certain restraint or dating etiquette. (eharmony.com)
Caring for the seriously ill was sometimes allowed, but only with certain restraints and conditions which I won't get into here. (redeeminggod.com)
As a consequence there «are certain restraints on Israel's creative imagination.» (religion-online.org)