1. By committing to memory
   "she knew the poem by heart"
   - by memory

Encyclopedia: By heart

• slice into
• slice through
• slice up
• sliced
• slicer
• slicing
• slick
• slick down
• slick magazine
• slick up
• slicked
• slicked up
• slicker
• slickly
• slickness
• slide
• slide action
• slide by
• slide down
• slide fastener
• slide projector
• slide rule
• slide valve
• slider
• slideway