My heart
leb (labe)
the heart; also used (figuratively) very widely for the feelings, the will and even the intellect
is smitten
nakah (naw-kaw')
to strike (lightly or severely, literally or figuratively)
and withered
yabesh (yaw-bashe')
to be ashamed, confused or disappointed; also (as failing) to dry up (as water) or wither (as herbage)
like grass
`eseb (eh'seb)
grass (or any tender shoot) -- grass, herb.
so that I forget
shakach (shaw-kakh')
to mislay, i.e. to be oblivious of, from want of memory or attention -- at all, (cause to) forget.
to eat
'akal (aw-kal')
to eat -- at all, burn up, consume, devour(-er, up), dine, eat(-er, up), feed (with), food, freely, in...wise(-deed, plenty), (lay) meat, quite.
my bread
lechem (lekh'-em)
food (for man or beast), especially bread, or grain (for making it) -- (shew-)bread, eat, food, fruit, loaf, meat, victuals.