Correct spelling for the English word "Frustrately" is [fɹʌstɹˈe͡ɪtli], [fɹʌstɹˈeɪtli], [f_ɹ_ʌ_s_t_ɹ_ˈeɪ_t_l_i] (IPA phonetic alphabet).
In vain.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "frustrately" does not have an established etymology as it is not a recognized word in standard English. It appears to be a combination of the word "frustrate" (meaning to cause feelings of dissatisfaction and annoyance) and the suffix "-ly" (which is commonly added to adjectives to form adverbs). However, it is important to note that "frustrately" is not widely recognized or used in the English language.