Correct spelling for the English word "musting needs" is [mˈʌstɪŋ nˈiːdz], [mˈʌstɪŋ nˈiːdz], [m_ˈʌ_s_t_ɪ_ŋ n_ˈiː_d_z] (IPA phonetic alphabet).
The term "musting needs" is not a commonly used phrase in the English language, so it does not have a widely accepted etymology. However, it seems to be a combination of two separate words with their own origins:
1. "Musting": The word "musting" is not a standalone word, but it appears to be derived from the verb "must" in the present participle form. "Must" in this context means to be compelled or obliged to do something. This usage of "must" dates back to Middle English and has Germanic origins.
2. "Needs": The word "needs" is an adverb that means "necessarily" or "inevitably". It originated from Middle English and comes from the Old English term "neod", which means "necessity" or "compulsion".