biān yuán
edge
fringe
verge
brink
periphery
marginal
borderline
biān yuán huà
to marginalize
marginalization
biān yuán rén
marginalized people (not part of mainstream society)
marginal man (term coined by social psychologist Kurt Lewin, referring to a person in transition between two cultures or social groups, not fully belonging to either)
biān yuán xìng rén gé zhàng ài
borderline personality disorder (BPD)