Traditional: 解開
解开 (jiě kāi) means “to untie; to undo; to solve (a mystery)”. It is an HSK 3 Chinese word (traditional 解開) in the HSK 3.0 vocabulary.
Practice each character:
他解开了这个难题。
Tā jiěkāi le zhège nántí.
He solved this difficult problem.
Updated: 2026-07-18