A word of disapproval is an expression used to show disapproval or dissatisfaction. The crossword solutions for this term are 'Bah' (3 letters), 'BOO' (3 letters), 'Fie' (3 letters), 'Ahem' (4 letters), 'Feh' (3 letters), and 'TUT' (3 letters). These words are all interjections, which are words used to express emotion or surprise. 'Bah' is an expression of contempt or disappointment, 'BOO' is an expression of disapproval, 'Fie' is an expression of disgust, 'Ahem' is an expression of surprise or embarrassment, 'Feh' is an expression of disdain, and 'TUT' is an expression of disapproval or impatience.