Exhibiting borderline personality disorder.
Showing bad taste.
Nearly; not clearly on one side or the other of a border or boundary, ambiguous.
A boundary or accepted division; a border.
An individual who has borderline personality disorder.
To border, or border on; to be physically close or conceptually akin to.
Nearly; not entirely but nevertheless to a great extent.
Contributing (especially if subtly) to discrimination (such as racism, sexism, homophobia, transphobia, or ageism).
Difficult to overcome, solve, or decide.
Not settled, uncertain, of uncertain outcome; debatable, questionable, open to doubt.
a problematic analysis
A problem or difficulty in a particular field of study.