边

side / edge / margin / border / boundary / CL:個|个[ge4] / simultaneously

suffix of a noun of locality

power / force / strength / ability / strenuously

to walk (side part of split character)

one side / either side / on the one hand / on the other hand / doing while

either side / both sides

east / east side / eastern part / to the east of

the top / above / overhead / upwards / the top margin / above-mentioned / those higher up

under / the underside / below

not to the point / wide of the mark / neither here nor there / irrelevant

to have the advantage overwhelmingly on one side / to support unconditionally

not care about one's appearance (idiom) / slovenly in dress and manner

pentagon

triangle

erhua variant of 東邊|东边[dong1 bian5]

irregular quadrilateral / trapezium

Sino-Russian Border Agreement of 1991

border area of northwest China (i.e. Xinjiang)

nonagon

(fig.) (slang) to stick one's nose in other people's affairs (i.e. the scope of other people's business that one concerns oneself with is as wide as an ocean vista)

heptagon

erhua variant of 上邊|上边[shang4 bian5]

erhua variant of 下邊|下边[xia4 bian5]

scalene triangle