Correct spelling for the English word "wor kid" is [wˈɜː kˈɪd], [wˈɜː kˈɪd], [w_ˈɜː k_ˈɪ_d] (IPA phonetic alphabet).
The word wor kid does not have an established etymology as it seems to be a misspelling or a combination of two separate words.
However, if you are referring to the word work or worke, its etymology can be traced back to the Old English word weorc or wyrcan. It evolved from the Proto-Germanic word werkan which means to work. Over time, the spelling and pronunciation of the word changed, leading to the modern-day form, work.