Correct spelling for the English word "Veneficious" is [vˌɛnɪfˈɪʃəs], [vˌɛnɪfˈɪʃəs], [v_ˌɛ_n_ɪ_f_ˈɪ_ʃ_ə_s] (IPA phonetic alphabet).
The word "veneficious" does not have a well-established etymology. It appears to be a rare and uncommon word that might have been derived from Latin roots.
One possible source could be the Latin word "veneficus", which means "poisoner" or "sorcerer". The suffix "-ious" is commonly used in English to form adjectives meaning "having the quality of" or "full of". Therefore, "veneficious" might be intended to describe something or someone as "poisonous" or "sorcerous". However, it is important to note that "veneficious" is not a widely recognized or standard word in English, and its usage might be limited to certain contexts or specific texts.