Correct spelling for the English word "knighten" is [nˈa͡ɪtən], [nˈaɪtən], [n_ˈaɪ_t_ə_n] (IPA phonetic alphabet).
The word "knighten" is formed from the noun "knight" and the suffix "-en". The noun "knight" traces back to the Old English word "cniht", meaning a young servant or a young male warrior. It is related to Old High German "kneht" and Old Norse "kné". Over time, "cniht" evolved in Middle English to "knight", referring specifically to a warrior in the medieval period who fought on horseback. The suffix "-en" in "knighten" is used to create a verb form from the noun "knight" and is commonly used in Old and Middle English to form verbs from nouns. In this case, "knighten" means to transform into or make someone a knight. However, it is worth noting that "knighten" is an archaic word and is not commonly used in modern English.