adjectives
deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc
"a faint outline"; "the wan sun cast faint shadows"; "the faint light of a distant candle"; "weak colors"; "a faint hissing sound"; "a faint aroma"; "a weak pulse"
lacking clarity or distinctness
"a dim figure in the distance"; "only a faint recollection"; "shadowy figures in the gloom"; "saw a vague outline of a building through the fog"; "a few wispy memories of childhood"
lacking strength or vigor
"damning with faint praise"; "faint resistance"; "feeble efforts"; "a feeble voice"
weak and likely to lose consciousness
"suddenly felt faint from the pain"; "was sick and faint from hunger"; "felt light in the head"; "a swooning fit"; "light-headed with wine"; "light-headed from lack of sleep"
indistinctly understood or felt or perceived
"a faint clue to the origin of the mystery"; "haven't the faintest idea"
is similar to
not clearly defined or easy to perceive or understand
"indistinct shapes in the gloom"; "an indistinct memory"; "only indistinct notions of what to do"
lacking conviction or boldness or courage
"faint heart ne'er won fair lady"