Usage examples for constrained:

• But Gerdy did not say much, looked tired, very pale, constrained "Dr. Adriaan" – Louis Couperus

• The earnestness of my manner added force to what I said, and constrained at least a momentary conviction. "The Allen House or Twenty Years Ago and Now" – T. S. Arthur

• His letters seemed stiff and constrained "Charlotte's Inheritance" – M. E. Braddon

• " Adelaide is very well," was her reply in a constrained voice. "The Second Generation" – David Graham Phillips