Correct spelling for the English word "Argnesyn" is [ˈɑːɡnɪsˌɪn], [ˈɑːɡnɪsˌɪn], [ˈɑː_ɡ_n_ɪ_s_ˌɪ_n] (IPA phonetic alphabet).
I apologize, but I couldn't find any information on the term "Argnesyn" to provide a dictionary definition. It's possible that "Argnesyn" may be a rare or specific term that is not widely recognized or documented. If you could provide more context or clarify the term's origin or usage, I can try to assist you further.