The word "yestreen" is a Scottish variant of the word "yesterday" and is pronounced as /ˈjɛstrɪn/. The spelling of this word is unique in that it uses the "t" and "r" together to create a distinct sound. The "ee" in the middle of the word represents a long "e" sound, while the final "n" is pronounced lightly. This word is commonly used in Scottish literature and poetry, and although it is not frequently used in modern-day English, it adds a beautiful flair to storytelling.
The word "yestreen" is of Middle English origin. It is a combination of the Middle English word "yester", meaning "yesterday", and the suffix "-en", which denoted a time expression in the past. Therefore, "yestreen" roughly means "yesterday evening" or "last night". Over time, the word has fallen out of common usage, but it can still be found in certain dialects and in literary works that aim to evoke an old-fashioned or poetic atmosphere.