four–letter word noun
plural ∼ words [count] 1 : an offensive word and especially an offensive word that has four letters : dirty word 1
▪ a book that contains a lot of four-letter words 2 : a word, subject, or idea that is disliked by some people : dirty word 2
▪ “Tax” is a four-letter word as far as he's concerned.
▪ a book that contains a lot of four-letter words
▪ “Tax” is a four-letter word as far as he's concerned.
