obscure
unnoticeable
blear
bleared
bleary
blurred
blurry
confused
dark
dim
discreet
faint
feeble
filmy
foggy
fuzzy
half-seen
half-visible
hazy
ill-defined
indefinite
indistinct
indistinguishable
insignificant
invisible
low-profile
merely glimpsed
misty
modest
out of focus
pale
semivisible
shadowy
unassuming
uncertain
unclear
undefined
undistinguished
unemphatic
unnoticed
unobtrusive
unostentatious
unplain
unrecognizable
vague
weak
inconspicuousness
blameless
defenseless
drab
featureless
homespun
inglorious
innocuous
inoffensive
nondescript
out-of-the-way
painless
predictable
presentable
subservient
unattractive
uneventful
unimportant
uninteresting
unmarked
unpretentious
unremarkable
unresponsive
valueless
conspicuous