If something gives way, it breaks or falls because it cannot hold the weight on it.
The old bridge gave way under the heavy truck.
古い橋が重いトラックの重みで崩れ落ちた。
to stop and let other vehicles go first before you move onto a bigger road
At the roundabout, you must give way to traffic from the right.
ラウンドアバウトでは、右側からの交通に道を譲らなければなりません。