속수무책in English:at one's wits' end

Examples
with 속수무책.

• 그는 문제를 해결할 방법이 없어서 속수무책이었다.geuneun munjele haegyeolhal bangbeobi eobseoseo soksumucheogieotda.He was at his wits' end because he had no way to solve the problem.