Correct spelling for the English word "Rudity" is [ɹˈuːdɪti], [ɹˈuːdɪti], [ɹ_ˈuː_d_ɪ_t_i] (IPA phonetic alphabet).
The word "rudity" is derived from the Latin term "ruditās", which ultimately traces back to the Latin verb "rudis", meaning "rough" or "rude". In Latin, "ruditās" referred to the state or quality of being unrefined, coarse, or unpolished. Over time, this term made its way into English and evolved to become "rudity", carrying a similar meaning.