minimal
minimum
narrow
peripheral
unprofitable
border
bordering
borderline
boundary
bounding
coastal
determinant
determinative
determining
disputable
doubtful
dubious
extreme
fringing
frontier
inferior
infinitesimal
insignificant
limbic
liminal
limit
limiting
littoral
low-priority
negligible
no great shakes
of no account
of no consequence
of no matter
of no significance
on the edge
questionable
rimming
secondary
shore
skirting
slight
small
terminal
threshold
tiny
unimportant
margin
correspond
crucial
cumulative
favorable
incremental
nominal
numerical
operational
optimal
overall
short-term
sustainable
theoretical