kitten

The word 'kitten' is a charming example of a diminutive form that traveled through languages. Its origin lies in the Late Latin word cattus for 'cat'. This root was adopted into Old French, where the affectionate diminutive suffix '-on' or '-oun' was added, creating chitoun or kitoun, literally meaning 'little cat'. Borrowed into Middle English, the word's spelling and pronunciation gradually simplified to 'kitten', shedding its overt French sound while retaining its core meaning. Thus, the modern term carries within it a centuries-old linguistic gesture of endearment towards the young of a familiar animal.

The word is a simplex form. It entered English as a borrowing from Anglo-Norman French (e.g., kitoun, chitoun), which itself derived from the Late Latin cattus, meaning 'cat'. The '-en' or '-on' ending was a common diminutive suffix in Old French.