To use a certain way of doing something, especially when it's not the best choice and you have no other options.
When the power went out, they had to resort to using candles for light.
전기가 끊겼을 때, 그들은 빛을 위해 양초를 사용해야 했다.
To depend on a certain method or way, especially when it's extreme or not a good choice.
Out of options, they resorted to asking strangers for help.
옵션이 떨어지자, 그들은 낯선 사람들에게 도움을 청하기로 결정했다.