be/feel sick at heart

be sick at heart

To be filled with a deeply unpleasant emotion, such as grief, remorse, dejection, etc. I am sick at heart to think that I may have contributed to her death in some way. Poor Tom's been sick at heart ever since his mother died.
See also: heart, sick

feel sick at heart

To feel a deeply unpleasant emotion, such as grief, remorse, dejection, etc. I feel sick at heart to think that I may have contributed to her death in some way. Poor Tom's felt sick at heart ever since his mother died.
See also: feel, heart, sick

be/feel sick at ˈheart

(formal) be very unhappy or disappointed: When I realized the accident was my fault, I felt sick at heart.
See also: feel, heart, sick