insignificant
thin
unimportant
adulterated
aerial
air-built
airy
aloof
atomic
attenuate
attenuated
boyish
broken
chimerical
cloud-built
corpuscular
cut
dainty
delicate
detached
diaphanous
dilute
diluted
disconnected
discontinuous
discrete
doubtful
dreamlike
dubious
embryonic
ethereal
evanescent
fanciful
fatuitous
fatuous
feeble
fine
fine-drawn
finespun
flimsy
fragile
frail
gapped
gaseous
gauzy
germinal
girlish
gossamer
gossamery
gracile
granular
hazy
illusory
elusive
ephemeral
filmy
fleeting
insecure
insubstantial
intangible
nebulous
perishable
precarious
risky
shaky
tangible
tentative
uncertain
unreliable
unsatisfactory
unstable