Devoid of any hypocrisy or pretense
Rainy's voice was quiet, and Damian sensed his heartfelt gratitude.
The tight note in her voice told him how heartfelt the simple words were.
Jonny's words were more heartfelt than she warranted necessary.
I offer my heartfelt congratulations and best wishes to you both.
My heartfelt sympathy is extended to the family circle.