subsagittate
subramose
subpinnate
nonperforming
unflourishing
subhirsute
fail
touched in the head
unfulfilled
dysfunctionality
slumpy
subramous
shortcoming
amiss
let the grass grow under one's feet
nonfulfilling
inefficaciousness
virtueless
successlessness
uneffigiated
copout
unsuccess
bite the big one
blemished
unappeasable
go nowhere
defect
inoptimally
mal-
declinal
rilesome
bog down
heteroclite
subappressed
nonsuccessful
unformed
clumsies
cumbersome
subconvoluted
exasperatingly
nonviable
pseudodeficient
lackless
subacrodrome
pseudodeficiency
streaky
unoptimizable
flop
doggishness
torpor