single-hearted

[ sing-guh l-hahr-tid ]

/ ˈsɪŋ gəlˈhɑr tɪd /

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

sin·gle-heart·ed·ly, adverb sin·gle-heart·ed·ness, noun

He was a plain German, upheld by a sense of duty and single-hearted trust in God.

Fort Duquesne and Fort Pitt |Various
To be crucified by those you have benefited is the cross of honour of all great, single-hearted men.

Smoke |Turgenev Ivan Sergeevich
"He will, He does," said the single-hearted girl, and put her other hand to her breast with a great gulp.

Hard Cash |Charles Reade
He was single-hearted in his aim, and to pursue it he was willing to sacrifice not only himself—many can do that—but others.

The Moon and Sixpence |W. Somerset Maugham

And the dog, it remembered also and even sought thee out, since dogs are more faithful and single-hearted than is mankind.

She and Allan |H. Rider Haggard