The word "snithe" is not a commonly used term, but it refers to something that is sly or cunning. Its pronunciation is /snaɪð/, with the "s" sound being followed by a long "i" sound, then a "th" sound at the end. The word has a Norse origin and is still used in some dialects of English. As with many words that are not frequently used, it is important to ensure that the spelling is correct when writing or using it in conversation.