καρδίας [37 verses](noun sg fem gen) "Of heart" is kardia, which means "heart (the physical organ)," "the seat of emotions (especially passion, rage, and anger)," "inclination," "desire," "purpose," "mind," "the pith (in wood), and "the deep (of the sea)." -- "Heart" is the Greek word that means "heart" both the physical organ and as the seat of emotions, which we discuss in this article here. Jesus and the Septuagint use a singular "heart" when referring to a group of people. This is a singular noun but the "of yours" is plural.