Where does “վատասիրտ” come from?

վատասիրտ (Armenian) comes from Old Armenian վատասիրտ, from Old Armenian սիրտ, from Proto-Indo-European ḱḗrdi-, from Proto-Indo-European ḱḗr — heart.

վատասիրտ (Armenian): fainthearted, chickenhearted, fearful, timid,...