Replanteamiento del origen del sufijo -ísimo en español

The main purpose of this study is to show an alternative origin of superlative suffix in Spanish. Thus, with the help of a relatively large corpus, which encompasses books written between the thirteenth and seventeenth centuries, we will try to deal with two hypotheses about their origin although considered: Morreale (1955) consider it as Italianism, meanwhile Alvar and Pottier (1980) contemplate it as morphological cultism.