1. at heart - Adverb
2. at heart - Phrase
in reality
Source: WordNetshe is very kind at heart Source: Internet
Aang is an Airbender at heart, it's what he mastered long before any of the other elements. Source: Internet
According to the former militant, Sanusi never had the interest of the North at heart and only spoke for his own interests. Source: Internet
Annie, 24, was sweet and made the 48-year-old Louisville, Kentucky resident feel younger at heart. Source: Internet
A playful design for anyone with kids - or who is a big kid at heart. Source: Internet
Although Worf was raised by humans, he considered himself a Klingon at heart and studied the ways of his people. Source: Internet