faint of heart

:  lacking courage and spirit :  cowardly

:  weak, dizzy, and likely to faint

:  lacking strength or vigor :  performed, offered, or accomplished weakly or languidly

:  to lose courage or spirit

:  to become weak

:  to lose consciousness because of a temporary decrease in the blood supply to the brain

:  the physiological action of fainting

:  the resulting condition :  syncope

:  a hollow muscular organ of vertebrate animals that by its rhythmic contraction acts as a force pump maintaining the circulation of the blood

:  a structure in an invertebrate animal functionally analogous to the vertebrate heart

:  breast, bosom

:  love

:  hearten

:  to fix in the heart