Pronunciation: [juːnˈa͡ɪtɛdɪŋ mˈaɹɪd͡ʒ] (IPA) 
Correct spelling for the English word "unitedding marriage" is [juːnˈa͡ɪtɛdɪŋ mˈaɹɪd͡ʒ], [juːnˈaɪtɛdɪŋ mˈaɹɪdʒ], [j_uː_n_ˈaɪ_t_ɛ_d_ɪ_ŋ m_ˈa_ɹ_ɪ_dʒ] (IPA phonetic alphabet).
The term "unitedding marriage" does not have an established etymology as it appears to be a compound of the words "united" and "wedding". However, both "united" and "wedding" have their own etymologies:
1. "United": The word "united" originated from the Latin word "unitus", the past participle of "unire", meaning "to join together". It entered Middle English through Old French and has retained its meaning of bringing or being brought together.
2. "Wedding": The word "wedding" has Middle English roots and comes from the Old English word "weddung" (also spelled "wedding" or "weddung"), meaning a marriage ceremony or the state of being wed. The Old English term is derived from "wedd", which referred to a pledge or a contract, often used in the context of marriage.
