The spelling of the word "yerself" is not standard or widely accepted. It is likely a colloquial or dialectal variation of the word "yourself". The IPA phonetic transcription of "yerself" would be /jɔrˈsɛlf/. The pronunciation of the word would have a similar sound to "yourself", with the main difference being the omission of the /u/ sound. While this variation is not considered correct grammar, it may be commonly used in certain regions or contexts.
The word "yerself" is an informal variant of the reflexive pronoun "yourself" in Scottish English and some other dialects. It has its roots in Middle English and Old English.
In Middle English, the pronoun "ye" was used to refer to the second person plural or as a polite form for the second person singular. The reflexive form of "ye" was "yourselven" or "yourself". Over time, phonetic changes and the evolution of the language led to the contraction of "yourselven" to "yersel" or "yerself".
The Old English equivalent of "yourself" was "eów-self", which also contributed to the development of "yerself". Both Middle English and Old English were West Germanic languages, and their influences shaped the formation and usage of "yerself" and its variants in Scottish English and related dialects.