Borderline
/bˈɔrdəˌrlaɪn/
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Definition
(adj) Nearly; not clearly on one side or the other of a border or boundary, ambiguous.
Sentence Examples
You really ought to wash your hands of this borderline illegal work.
Layla suffered from borderline personality disorder.
CEFR Practice Quiz
The doctor said his blood pressure was ____ and needed to be watched city.