single-hearted

[ sing-guhl-hahr-tid ]

adjective

sincere and undivided in feeling or spirit; dedicated; not reflecting mixed emotions: He was single-hearted in his patriotism.

Origin of single-hearted

First recorded in 1570–80

Instead of seeing in Mildred a possibly jealous woman, causing mental misery, she appeared a vision of single-hearted devotion.
The Fifth String | John Philip Sousa
That he loved power is surely no reproach to a statesman who used it as he did with single-hearted devotion to his country.
The Political History of England - Vol. X. | William Hunt
What is more at ease, more abstracted from the world, than a true single-hearted honesty?
Dictionary of Quotations from Ancient and Modern, English and Foreign Sources | James Wood
To be crucified by those you have benefited is the cross of honour of all great, single-hearted men.
Smoke | Turgenev Ivan Sergeevich
He was a simple, single-hearted man, moderate in all his views and wishes, and neither ambitious of distinction nor of wealth.
Life and Correspondence of David Hume, Volume II (of 2) | John Hill Burton

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