英和和英

on both sides

convex on both sides

concave on both sides

both directions

either side （both sides と言うべからず）.

both sides of something

both extremities

both ends of something

two sides facing each other

one side out of two

both cheeks

side by side

supported by both sides

It is sharp at both ends.

cut both ways

two directions

the opposite side

They stand on either side

They form a lane.［注意］“Both sides”＝双方。

the two sides of the mouth

two sides of something having a polygon shape

on both hands

one of a pair

one side of a matter

on both sides of the street

be without side＝have no side

on either side of the car

both sides of a road

to stand in two rows

both thighs