borderline
noun
[ ˈbɔːdəlʌɪn ]
• a boundary separating two countries or areas.
borderline
adjective
• only just acceptable in quality or as belonging to a category.
• "references may be requested in borderline cases"
Similar:
marginal,
indefinite,
uncertain,
unsure,
unsettled,
undecided,
up in the air,
doubtful,
open to doubt,
problematic,
indeterminate,
unclassifiable,
ambivalent,
equivocal,
questionable,
open to question,
disputable,
debatable,
arguable,
controversial,
contentious,
moot,
iffy,
dodgy,
