Correct spelling for the English word "shild" is [ʃˈɪld], [ʃˈɪld], [ʃ_ˈɪ_l_d] (IPA phonetic alphabet).
The etymology of the word "shild" can be traced back to the Old English word "scield" or "sceald", which meant a flat piece of wood or bark. This Old English term is derived from the Proto-Germanic word "*skelduz". The word eventually evolved into "shield", which refers to a protective device used for defense in battle.