mid-13c., portraien, "to draw, paint" (something), from Anglo-French purtraire, Old French portraire "to draw, to paint, portray" (12c.), literally "trace, draw forth," from por- "forth" (from Latin pro-; see pro-) + traire "trace, draw," from Latin trahere "to drag, draw" (see tract (n.1)). Meaning "depict in words, describe" is from late 14c. Related: Portrayed; portrayer; portraying.
Latin protrahere was "to draw forth" but in Medieval Latin also "to draw, paint."
suffix forming nouns of action from verbs, mostly from Latin and French, meaning "act of ______ing" (such as survival, referral), Middle English -aille, from French feminine singular -aille, from Latin -alia, neuter plural of adjective suffix -alis, also used in English as a noun suffix. Nativized in English and used with Germanic verbs (as in bestowal, betrothal).
<a href="https://www.etymonline.com/word/portrayal">Etymology of portrayal by etymonline</a>
Harper, D. (n.d.). Etymology of portrayal. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/portrayal