Correct spelling for the English word "Amerikus" is [ˈaməɹˌɪkəs], [ˈaməɹˌɪkəs], [ˈa_m_ə_ɹ_ˌɪ_k_ə_s] (IPA phonetic alphabet).
The word "Amerikus" does not have an established etymology. However, it appears to be a variant or possible misspelling of "Americus", which is a Latinized form of the name Amerigo. Amerigo is an Italian name that was made famous by the Florentine explorer Amerigo Vespucci, who is known for his voyages to the Americas in the late 15th and early 16th centuries. It is worth noting that "Americus" or "Amerigo" eventually gave rise to the name America, which is now used to denote the continents of North and South America.