The term 'shakes a finger at' can be summarized by two crossword solutions: 'tsktsks' (7 letters) and 'SCOLDS' (6 letters). Tsktsks is an interjection used to express disapproval or disappointment, usually accompanied by a shaking of the head and a clicking of the tongue. Scolding is a form of verbal reprimand or criticism, often accompanied by a shaking of the finger. Both terms are used to express disapproval or disappointment in someone's behavior.