From Longman Dictionary of Contemporary Englishsick at heartsick at heartliteraryUPSET very unhappy, upset, or disappointed about something I was sick at heart to think that I would never see the place again. → sick
Examples from the Corpus
sick at heart• All the cruelty and injustice made her sick at heart.• But Aeschylus too was sick at heart.• He struggles against it, he rejects it, he grows sick at heart.• I was alone, dry of mouth, sick at heart.• She turned away, feeling sick at heart, even though she knew she should be glad.• They were sick at heart, weak in the bones. 