Hmm... I hope you understand my question. I am not sure if they are named like this. I mean the word or the sound you say when you deliberately omit some part of your sentence. For example, you are a grammar teacher and you read aloud an open cloze question: I arrived at the ferry pier early this morning and ______ for Sarah, who finally turned up 20 minutes after the last ship departed. When you read aloud this sentence, what word or sound will you say to represent the blank? *** I say "toot" (unaspirated) to replace the blank for this English sentence. If the sentence is Chinese, I also say "乜" to replace a blank. "乜" sounds like "mud". In Cantonese it means "what".