橫鉤

horizontal stroke with a hook at the end (in Chinese characters)

horizontal / across / crosswise / horizontal stroke (in Chinese characters) / to place (sth) flat (on a surface) / to cross (a river, etc) / in a jumble / chaotic / (in fixed expressions) harsh and unreasonable / violent

harsh and unreasonable / unexpected

to hook / to sew / to crochet / hook / check mark or tick / window catch