Oh, if so, punish me as you will; but do not—do not speak to me in tones and manner so formal and constrained.
"Oh," said Morrel, "I know not, indeed, if I may reveal this secret to mortal ears, but fatality impels me, necessity constrains me, count"—Morrel hesitated.
We will not constrain you to help us; we enroll no one against his conscience, but we will compel you to act generously, even if you are not disposed to do so.
"What is the matter?" said Madame de Villefort in a harsh and constrained tone.
If Valentine could have seen the trembling step and agitated countenance of Franz when he quitted the chamber of M. Noirtier, even she would have been constrained to pity him.
On arriving at the house, Morrel was not even out of breath, for love lends wings to our desires; but Barrois, who had long forgotten what it was to love, was sorely fatigued by the expedition he had been constrained to use.
Madame de Morcerf had lived there since leaving her house; the continual silence of the spot oppressed her; still, seeing that Albert continually watched her countenance to judge the state of her feelings, she constrained herself to assume a monotonous smile of the lips alone, which, contrasted with the sweet and beaming expression that usually shone from her eyes, seemed like "moonlight on a statue,"—yielding light without warmth.
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Show samples from other sources
...it is very grievous to be constrained to keep our hands off such a dainty dish as Narnia.
C.S. Lewis -- The Horse and His Boy
It seemed that we were all cloaked in an unwelcome garment of racial difference that constrained, confined, and restricted us.