• to imbibe, to incept, to soak, to suck
• in the secret recesses of the heart
• kind hearts are more than coronets
• hardy, persistent, stout, tenacious, to die hard, tough
• harrowing, heart-breaking, heart-rending
• to one's heart's content, to the heart's content
• her heart was beating a wild tattoo
• her heart swelled exultantly