faint
noun
a spontaneous loss of consciousness caused by insufficient blood to the brain
verb
pass out from weakness, physical or emotional distress due to a loss of blood supply to the brain
adjective
deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc
“a faint outline”
“the wan sun cast faint shadows”
Synonymsweaklacking clarity or distinctness
“a dim figure in the distance”
“only a faint recollection”
lacking strength or vigor
“damning with faint praise”
“faint resistance”
Synonymsfeebleweak and likely to lose consciousness
“suddenly felt faint from the pain”
“was sick and faint from hunger”
indistinctly understood or felt or perceived
“a faint clue to the origin of the mystery”
“haven't the faintest idea”
lacking conviction or boldness or courage
“faint heart ne'er won fair lady”
Source: WordNet 3.1, Princeton University