noun
both sides; both flanks
Refers to the two sides of something, often the left and right sides of the body, a road, or an object.
彼は両脇に荷物を抱えていた。
He was carrying luggage under both arms.
道の両脇に桜の木が植えられている。
Cherry trees are planted on both sides of the road.
両側 is a more general term for 'both sides' of any object or space, while 両脇 often implies the sides of a person's body or a path.
Compound of 両 (both) and 脇 (side, armpit).