Correct spelling for the English word "catoninetails" is [kˈatənˌa͡ɪnte͡ɪlz], [kˈatənˌaɪnteɪlz], [k_ˈa_t_ə_n_ˌaɪ_n_t_eɪ_l_z] (IPA phonetic alphabet).
The term "catoninetails" does not have a well-established etymology as it is not a widely recognized word. It appears to be a combination of two separate words: "cat-o-nine-tails" and "Catoninetails".
"Catoninetails" might be a distortion or a misspelling of "cat-o-nine-tails", which refers to a type of whip historically used for corporal punishment in the British Royal Navy and other institutions. The term derives from the design of the whip, which typically had nine lashes or "tails" attached to a handle or rope.
It is possible that "catoninetails" was coined as a playful or creative variation of "cat-o-nine-tails" without any specific etymology or historical context. As a result, it is not widely recognized or used outside of specific instances where someone might be intentionally modifying the original term for humorous or artistic purposes.