Usage examples for unconstrained:

• His movements were like a bird's- swift, decided, and unconstrained his clothing was ragged; the white, fair skin showed through the rents in his garments. "The Magic Skin" – Honore de Balzac

• His every movement bore the impress of royal self- confidence, yet at the same time was unconstrained and graceful. "The Complete Historical Romances of Georg Ebers" – Georg Ebers

• The sight of Victorine riding familiarly, and with an evident joyous pride, by the side of one of the richest men in the country, and a young man at that,- and a young man, moreover, who looked and behaved as if he were in love with his companion,- how could the poor miller be expected to be cordial and unconstrained with such a sight before his eyes! "Between Whiles" – Helen Hunt Jackson

• A flame glared from the eyes of the consul and played over the face of Fouche, but the latter appeared not to notice it, for he cast down his eyes again, and his manner was easy and unconstrained "Marie Antoinette And Her Son" – Louise Muhlbach Official