Penn'orth is a British informal shortening of pennyworth: what you could once buy for a penny, or a very small amount of something. You will hardly hear it for shopping now; a penny buys almost nothing, and the word feels old. What still lives is the set phrase your two penn'orth — your little bit of opinion, whether anyone asked for it or not. It is the British cousin of American your two cents. You may also meet not a penn'orth of difference, meaning no real difference at all. The apostrophe stands for letters that have dropped out in speech (pennyworth → penn'orth). It is spoken and chatty, not a word for formal writing, and many younger British speakers would not use it except as a joke or in that opinion phrase.

一便士的分量（英式口語；your two penn'orth 指兩句意見）